Dual fuel heater with selector valve

Information

  • Patent Grant
  • 10222057
  • Patent Number
    10,222,057
  • Date Filed
    Tuesday, June 7, 2016
    8 years ago
  • Date Issued
    Tuesday, March 5, 2019
    5 years ago
  • Inventors
  • Examiners
    • Shirsat; Vivek
    Agents
    • Innovation Capital Law Group, LLP
    • Lin; Vic
Abstract
A heater assembly can be used with a gas appliance. The gas appliance can be a dual fuel appliance for use with one of a first fuel type or a second fuel type different than the first. The heater assembly can include a housing, and an actuation member. The housing has a first fuel hook-up for connecting the first fuel type to the heater assembly, a second fuel hook-up for connecting the second fuel type to the heater assembly, and an internal valve. The actuation member can control the position of the internal valve based on whether the first or the second fuel hook-up is used.
Description
BACKGROUND OF THE INVENTION

1. Field of the Invention


Certain embodiments disclosed herein relate generally to a heating apparatus for use in a gas appliance particularly adapted for dual fuel use. The heating apparatus can be, can be a part of, and can be used in or with many different appliances, including, but not limited to: heaters, boilers, dryers, washing machines, ovens, fireplaces, stoves, water heaters, barbeques, etc.


2. Description of the Related Art


Many varieties of appliances, such as heaters, boilers, dryers, washing machines, ovens, fireplaces, stoves, and other heat-producing devices utilize pressurized, combustible fuels. Some such devices operate with liquid propane, while others operate with natural gas. However, such devices and certain components thereof have various limitations and disadvantages. Therefore, there exists a constant need for improvement in appliances and components to be used in appliances.


SUMMARY OF THE INVENTION

A heater assembly can be used with one of a first fuel type or a second fuel type different than the first. The heater assembly can include a housing, an actuation member, and a low pressure cut-off switch. The housing having first and second fuel hook-ups, the first fuel hook-up for connecting a first fuel type to the heater assembly and the second fuel hook-up for connecting a second fuel type to the heater assembly. A first flow path from the first fuel hook-up and a second flow path from the second fuel hook-up. The actuation member comprising a first valve member positioned within the first flow path and a second valve member positioned within the second flow path, the actuation member having an end located at the second fuel hook-up, wherein the actuation member is configured such that in a first position one of the first flow path and the second flow path is open and the other is closed, and connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to a second position which opens the closed flow path from the first position and closes the open flow path from the first position.


In some embodiments, the heater assembly further comprises a pressure regulator and the second flow path passes through the pressure regulator before joining with the first flow path. The housing can be an inlet valve housing that comprises a first outlet wherein the first flow path and the second flow path connect within the inlet valve housing so that fuel flow from the first flow path and the second flow path leaves the outlet.


According to some embodiments, a heater assembly can be used with one of a first fuel type or a second fuel type different than the first. The heater assembly can comprise an inlet valve housing. The inlet valve housing can comprise first and second fuel hook-ups, the first fuel hook-up for connecting a first fuel type to the heater assembly and the second fuel hook-up for connecting a second fuel type to the heater assembly; an outlet; a low pressure cut-off switch; a pressure regulator; and an actuation member. The inlet valve housing can define a first flow path from the first fuel hook-up to the outlet and a second flow path from the second fuel hook-up to the outlet, the low pressure cut-off switch within the first flow path and the pressure regulator within the second flow path. The actuation member can be configured to move between a first position wherein the actuation member substantially closes the second flow path and a second position wherein the actuation member substantially closes the first flow path, wherein connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to the second position.





BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects and advantages are described below with reference to the drawings, which are intended to illustrate but not to limit the invention. In the drawings, like reference characters denote corresponding features consistently throughout similar embodiments.



FIG. 1A is a perspective cutaway view of a portion of one embodiment of a heater configured to operate using either a first fuel source or a second fuel source.



FIG. 1B is a perspective cutaway view of the heater of FIG. 1A.



FIG. 2A is a perspective view of one embodiment of a heater configured to operate using either a first fuel source or a second fuel source.



FIG. 2B is an exploded perspective view of the heater of FIG. 2A.



FIG. 2C is a perspective view of one portion of the heater of FIG. 2A.



FIG. 3A is perspective view of one embodiment of a heating source.



FIG. 3B is a perspective view of the partially disassembled heating source of FIG. 3A.



FIG. 3C is a front view of the heating source of FIG. 3A.



FIG. 3D is a cross-section of the heating source taken alone line A-A of FIG. 3C.



FIG. 4 is a top view of the partially disassembled heating source of FIG. 3B.



FIG. 4A is a cross-section of a heating source taken along line A-A of FIG. 4.


FIGS. 4A1 and 4A2 show the heating source of FIG. 4A in two different positions.


FIGS. 4B1 and 4B2 are cross-sections of the heating source of FIG. 4A taken along line B-B in two different positions.



FIGS. 5A-D are schematic views of different embodiments of heating sources.



FIGS. 6A-B are schematic views of different embodiments of heating sources.



FIG. 7 is a perspective view of another embodiment of a partially disassembled heating source.



FIG. 8 is a front view of the heating source of FIG. 7.



FIG. 8A is a cross-sectional view of the heating source of FIG. 8 taken along line A-A.



FIG. 9 is a top view of the partially disassembled heating source of FIG. 7.



FIG. 9A is a cross-section of a heating source taken along line A-A of FIG. 9.


FIGS. 9A1 and 9A2 show the heating source of FIG. 9A in two different positions.



FIGS. 9B and 9C are cross-sections of the heating source of FIG. 9A taken along line C-C in two different positions.



FIGS. 10, 10A, and 10B illustrate perspective views of different embodiments of heating sources.



FIGS. 11A and 11B are cross-sections of a heating source in two different positions.



FIG. 12 is a cross-section of another heating source.



FIG. 13 is a cross-section of still another heating source.



FIG. 14 shows a perspective view of another embodiment of a heating source.



FIG. 15 is a cross-section of the heating source of FIG. 14.



FIG. 16 is a cross-section of the heating source of FIG. 14 showing the pressure regulators.



FIG. 17 is a cross-section of the heating source of FIG. 14 showing two valves.



FIG. 18A is a perspective view of one embodiment of a fuel selector valve.



FIG. 18B is a cutaway of the valve of FIG. 18A.



FIGS. 19A and 19B are cross-sections of the valve of FIG. 18A.



FIG. 20 is a top view of another embodiment of a fuel selector valve.



FIG. 21 is a cross-section of the fuel selector valve of FIG. 20.



FIGS. 22A and 22B are cross-sections of the fuel selector valve of FIG. 20 with an attached fuel source.



FIG. 23 is a cross-section of the fuel selector valve of FIG. 20, taken along the line 23-23 of FIG. 22B.



FIG. 24 is a perspective view of a portion of a heater.



FIG. 25 is a perspective cross-section view of a valve from FIG. 24.



FIG. 25A is a cross-section view of a valve used with a first fuel at a first fluid pressure.



FIG. 25B is a cross-section view of the valve of FIG. 25 with the first fuel at a second fluid pressure.



FIG. 26 is a cross-section view of the valve of FIG. 25 with a second fuel.



FIG. 27 is a perspective view of a portion of a heater.



FIG. 28 is a perspective cross-section view of a valve from FIG. 27.



FIG. 29A is a cross-section view of a valve used with a first fuel at a first fluid pressure.



FIG. 29B is a cross-section view of the valve of FIG. 28 with the first fuel at a second fluid pressure.



FIG. 30 is a cross-section view of the valve of FIG. 28 with a second fuel.





DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Many varieties of space heaters, fireplaces, stoves, ovens, boilers, fireplace inserts, gas logs, and other heat-producing devices employ combustible fuels, such as liquid propane and natural gas. These devices generally are designed to operate with a single fuel type at a specific pressure. For example, as one having skill in the art would appreciate, some gas heaters that are configured to be installed on a wall or a floor operate with natural gas at a pressure in a range from about 3 inches of water column to about 6 inches of water column, while others operate with liquid propane at a pressure in a range from about 8 inches of water column to about 12 inches of water column.


In many instances, the operability of such devices with only a single fuel source is disadvantageous for distributors, retailers, and/or consumers. For example, retail stores often try to predict the demand for natural gas units versus liquid propane units over a given season, and accordingly stock their shelves and/or warehouses with a percentage of each variety of device. Should such predictions prove incorrect, stores can be left with unsold units when the demand for one type of unit was less than expected, while some potential customers can be left waiting through shipping delays or even be turned away empty-handed when the demand for one type of unit was greater than expected. Either case can result in financial and other costs to the stores. Additionally, some consumers can be disappointed to discover that the styles or models of stoves, fireplaces or other device, with which they wish to improve their homes, are incompatible with the fuel sources with which their homes are serviced.


Certain advantageous embodiments disclosed herein reduce or eliminate these and other problems associated with devices having heating sources that operate with only a single type of fuel source. Furthermore, although certain of the embodiments described hereafter are presented in the context of vent-free heating systems, the apparatus and devices disclosed and enabled herein can benefit a wide variety of other applications and appliances.



FIG. 1A illustrates one embodiment of a heater 100. The heater 100 can be a vent-free infrared heater, a vent-free blue flame heater, or some other variety of heater, such as a direct vent heater. Some embodiments include boilers, stoves, dryers, fireplaces, gas logs, etc. Other configurations are also possible for the heater 100. In many embodiments, the heater 100 is configured to be mounted to a wall or a floor or to otherwise rest in a substantially static position. In other embodiments, the heater 100 is configured to move within a limited range. In still other embodiments, the heater 100 is portable.


The heater 100 can comprise a housing 200. The housing 200 can include metal or some other suitable material for providing structure to the heater 100 without melting or otherwise deforming in a heated environment. In the illustrated embodiment, the housing 200 comprises a window 220, one or more intake vents 240 and one or more outlet vents 260. Heated air and/or radiant energy can pass through the window 220. Air can flow into the heater 100 through the one or more intake vents 240 and heated air can flow out of the heater 100 through the outlet vents 260.


With reference to FIG. 1B, in certain embodiments, the heater 100 includes a regulator 120. The regulator 120 can be coupled with an output line or intake line, conduit, or pipe 122. The intake pipe 122 can be coupled with a heater control valve 130, which, in some embodiments, includes a knob 132. As illustrated, the heater control valve 130 is coupled to a fuel supply pipe 124 and an oxygen depletion sensor (ODS) pipe 126, each of which can be coupled with a fluid flow controller 140. The fluid flow controller 140 can be coupled with a first nozzle line 141, a second nozzle line 142, a first ODS line 143, and a second ODS line 144. In some embodiments, the first and the second nozzle lines 141, 142 are coupled with a nozzle 160, and the first and the second ODS lines 143, 144 are coupled with an ODS 180. In some embodiments, the ODS comprises a thermocouple 182, which can be coupled with the heater control valve 130, and an igniter line 184, which can be coupled with an igniter switch 186. Each of the pipes 122, 124, and 126 and the lines 141-144 can define a fluid passageway or flow channel through which a fluid can move or flow.


In some embodiments, including the illustrated embodiment, the heater 100 comprises a burner 190. The ODS 180 can be mounted to the burner 190, as shown. The nozzle 160 can be positioned to discharge a fluid, which may be a gas, liquid, or combination thereof into the burner 190. For purposes of brevity, recitation of the term “gas or liquid” hereafter shall also include the possibility of a combination of a gas and a liquid. In addition, as used herein, the term “fluid” is a broad term used in its ordinary sense, and includes materials or substances capable of fluid flow, such as gases, liquids, and combinations thereof.


Where the heater 100 is a dual fuel heater, either a first or a second fluid is introduced into the heater 100 through the regulator 120. Still referring to FIG. 1B, the first or the second fluid proceeds from the regulator 120 through the intake pipe 122 to the heater control valve 130. The heater control valve 130 can permit a portion of the first or the second fluid to flow into the fuel supply pipe 124 and permit another portion of the first or the second fluid to flow into the ODS pipe 126. From the heater control valve 130, the first or the second fluid can proceed to the fluid flow controller 140. In many embodiments, the fluid flow controller 140 is configured to channel the respective portions of the first fluid from the fuel supply pipe 124 to the first nozzle line 141 and from the ODS pipe 126 to the first ODS line 143 when the fluid flow controller 140 is in a first state, and is configured to channel the respective portions of the second fluid from the fuel supply pipe 124 to the second nozzle line 142 and from the ODS pipe 126 to the second ODS line 144 when the fluid flow controller 140 is in a second state.


In certain embodiments, when the fluid flow controller 140 is in the first state, a portion of the first fluid proceeds through the first nozzle line 141, through the nozzle 160 and is delivered to the burner 190, and a portion of the first fluid proceeds through the first ODS line 143 to the ODS 180. Similarly, when the fluid flow controller 140 is in the second state, a portion of the second fluid proceeds through the nozzle 160 and another portion proceeds to the ODS 180. As discussed in more detail below, other configurations are also possible.



FIGS. 2A-2C illustrate another embodiment of a heater 100′ such as a BBQ grill. In some embodiments, the heater 100′ is configured to be mounted to a wall or a floor or to otherwise rest in a substantially static position. In other embodiments, the heater 100′ is configured to move within a limited range. In still other embodiments, the heater 100′ is portable.


With reference to FIG. 2A, the heater can comprise a housing 200′. The housing 200′ can include metal or some other suitable material for providing structure to the heater 100′ without melting or otherwise deforming in a heated environment. In the illustrated embodiment, the housing 200′ comprises a cover 250, which can preferably be moved from a closed to an open position, allowing heated air and/or radiant energy to pass out of the housing 200′. In some embodiments, a grill 170 can be positioned within or near the housing.


In some embodiments, the heater 100′ can also include a frame 150 attached to the housing. The frame can support and/or elevate the housing. The frame can also include one or more wheels 152, which can make it easier to move the heater 100′.



FIG. 2B illustrates an exploded view of the heater 100′. As illustrated, the heater can include a fuel selector valve 3, embodiments of which are described in more detail below. Where the heater 100′ is a dual fuel heater, either a first or second fuel can be introduced into the heater 100′ through the fuel selector valve 3. The fuel can flow to one or more burners 190′. In some embodiments, the heater 100′ can have one or more different types and/or sizes of burners. As shown, the heater 100′ has a number of burners within the BBQ grill, as well as a side burner. In some embodiments, one or more of the burners can have a control valve 130′ associated with it, and/or have a burner cover 192. In some embodiments a control valve can include a knob 132′.



FIG. 2C illustrates a more detailed view of embodiments of a fuel selector valve 3 and burners 190′. As illustrated, in some embodiments the fuel selector valve 3 can have a first outlet 18 that leads to a first flow path 71, and a second outlet 19 that leads to a second flow path 73. The first and second flow paths can intersect at a common or shared flow path 75. In some embodiments, the second flow path can pass through a pressure regulator 16 before joining with the first flow path.


A heating assembly or heating source 10 that can be used with the heater 100, 100′ or other gas appliances, will now be described. The heating source 10 can be configured such that the installer of the gas appliance can connect the assembly to one of two fuels, such as either a supply of natural gas (NG) or a supply of propane (LP) and the assembly will desirably operate in the standard mode (with respect to efficiency and flame size and color) for either gas.


Looking at FIGS. 3A-4B2, a heating source 10 can comprise a fuel selector valve 3. The fuel selector valve 3 can be used for selecting between two different fuels and for setting certain parameters, such as one or more flow paths, and/or a setting on one or more pressure regulators based on the desired and selected fuel. The fuel selector valve 3 can have a first mode configured to direct a flow of a first fuel (such as NG) in a first path through the fuel selector valve 3 and a second mode configured to direct a flow of a second fuel (such as LP) in a second path through the fuel selector valve 3.


The fuel selector valve 3 can further comprise first and second fuel source connections or hook-ups 12, 14. The fuel selector valve 3 can connect to one of two different fuel sources, each fuel source having a different type of fuel therein. For example, one fuel source can be a cylinder of LP and another fuel source can be a NG fuel line in a house, connected to a city gas line. The first and second fuel source connections 12, 14 can comprise any type of connection such as a threaded connection, a locking connection, an advance and twist type connection, etc.


An embodiment of a fuel selector valve 3 is shown in FIG. 3A with a housing 11 and a cover 20. The cover has been removed in FIG. 3B revealing some of the internal components of the illustrated embodiment. A pressure regulator 16 is positioned within the housing such that fluid entering the fuel selector valve 3 via either the first or second fuel source connection 12, 14 can be directed to the pressure regulator 16. FIG. 3D shows a cross-section of the selector valve 3 showing the flow path between the fuel source connections and the pressure regulator. Fuel from the pressure regulator 16 can then flow to the outlet 18, as can also be seen with reference to FIG. 3D. The fuel can then flow to various other components, such as a burner. In some embodiments, the fuel selector valve 3 has two separate pressure regulators such that each fuel source connection directs fuel to a specific pressure regulator which can then travel to the outlet.


The fuel selector valve 3 can be configured to select one or more flow paths through the fuel selector valve 3 and/or to set a parameter of the fuel selector valve. For example, the fuel selector valve 3 can include one or more valves, where the position of the valve can determine one or more flow paths through the fuel selector valve 3, such as a fluid exit or entry pathway. As another example, the fuel selector valve 3 can control certain parameters of the pressure regulator 16.


With reference to FIGS. 4-4A2, it can be seen that the fuel selector valve 3 can include one or more actuation members 22, 24. The actuation members 22, 24 can be used for many purposes such as to select one or more flow paths through the fuel selector valve 3 and/or to set a parameter of the fuel selector valve. The one or more actuation members can be provided in the fuel selector valve 3 in many ways. As shown, the actuation members are spring loaded rods that can be advanced in a linear motion. An actuation member can be one or more of a linkage, a rod, an electric or mechanical button, a pin, a slider, a gear, a cam, etc.


As shown, the actuation member 22 has an end 26 positioned within the first fuel source connection 12. A connector 30 can be attached to the first fuel source connection 12 by advancing the connector into the first fuel source connection 12. This can force the actuation member end 26 into the housing of the fuel selector valve 3. This force then counteracts a spring force provided by a spring 32 to open a valve 34.


FIG. 4A1 shows the open valve 34 with the connector 30 attached to the first fuel source connection 12. The connector 30 can be part of a fuel source to provide fuel to the heater assembly 10. With the valve 34 in the open position, fuel from the fuel source can flow through the connector 30 and into the fuel selector valve 3. In particular, as shown, fuel can flow into the first fuel source connection 12, then to the pressure regulator 16 and finally out of the fuel selector valve 3 by way of outlet 18 (FIG. 3A-3B).


Alternatively, the connector 30 can be connected to the second fuel source connection 14. This can open the valve 36 by pressing on the end 28 of the second actuation member 24. Fuel can then flow from the fuel source through the connector 30 into the fuel source connection 14. The fuel can then flow to the pressure regulator 16 and out through outlet 18.


The presence of two valves 34, 36, one at each fuel source connection 12, 14, can prevent fuel from exiting the fuel selector valve 3 undesirably, as well as preventing other undesirable materials from entering the fuel selector valve 3. In some embodiments, the fuel selector valve can utilize a cap or plug to block the unused fuel source connection. This may be in addition to or instead of one or more valves at the fuel source connections. For example, in some embodiments the actuation member 24 does not include a valve at the fuel source connection 14.


In addition to or instead of providing a valve 36 at the inlet or fuel source connection 14, the actuation member 24 can be in a position to control a parameter of the pressure regulator 16. Referring back to FIGS. 3B and 4, it can be seen that an arm 38 extends between the actuation member 24 and the pressure regulator 16. The actuation member 24 can act on the arm, determining the position of the arm 38. This position can be seen by comparing the position of the arm 38 in FIGS. 4A1 and 4A2, as well as 4B1 and 4B2. The position of the arm 38 can then determine the height (H1, H3) of the spring 40 within the pressure regulator. That is, though the length of the spring is constant, the height H1 of the spring when the diaphragm is in a first position shown in FIG. 4B1 is greater than the height H3 of the spring when the spring is in the position shown in FIG. 4B2. As shown, the arm 38 contacts a cap 41 that is connected to the spring 40. The height of the spring 40 can be a factor in determining the force required to move the diaphragm 42. The spring height can be used to preset the pressure settings of the pressure regulator. Thus, the spring can be tensioned to regulate the pressure of the incoming fuel depending on whether the first or second fuel source is utilized.


In another embodiment, the actuation member contacts the pressure regulator 16 directly, such as at the cap 41, without the assistance of an arm or other device to set the regulating pressure of the pressure regulator.


The pressure regulator 16 can be set to a first position as shown in FIG. 4B1. The initial position can allow for flow control of the first fuel at an initial predetermined pressure or pressure range. The initial predetermined pressure or pressure range is lower than the second predetermined pressure or pressure range based on the second position as shown in FIG. 4B2. For example, the predetermined selected pressure can depend at least in part on the particular fuel used, and may desirably provide for safe and efficient fuel combustion and reduce, mitigate, or minimize undesirable emissions and pollution. In some embodiments, the first pressure can be set to be within the range of about 3 inches of water column to about 6 inches of water column, including all values and sub-ranges therebetween. In some embodiments, the threshold or flow-terminating pressure is about 3 inches of water column, about 4 inches of water column, about 5 inches of water column, or about 6 inches of water column.


In some embodiments, the second pressure can be set to be within the range of about 8 inches of water column to about 12 inches of water column, including all values and sub-ranges therebetween. In some embodiments, the second threshold or flow-terminating pressure is about equal to 8 inches of water column, about 9 inches of water column, about 10 inches of water column, about 11 inches of water column, or about 12 inches of water column.


When natural gas is the first fuel and propane is the second fuel, the first pressure, pressure range and threshold pressure are less than the second pressure, pressure range and threshold pressure. Stated differently, in some embodiments, when natural gas is the first fuel and propane is the second fuel, the second pressure, pressure range and threshold pressure are greater than the first pressure, pressure range and threshold pressure.


The pressure regulator 16 can function in a similar manner to that discussed in U.S. application Ser. No. 11/443,484, filed May 30, 2006, now U.S. Pat. No. 7,607,426, incorporated herein by reference and made a part of this specification; with particular reference to the discussion on pressure regulators at columns 3-9 and FIGS. 3-7 of the issued patent.


The pressure settings can be further adjusted by tensioning of a screw or other device 41 that allows for flow control of the fuel at a predetermined pressure or pressure range and selectively maintains an orifice open so that the fuel can flow through spring-loaded valve or valve assembly of the pressure regulator. If the pressure exceeds a threshold pressure, a plunger seat 43 can be pushed towards a seal ring 45 to seal off the orifice, thereby closing the pressure regulator.


The fuel selector valve 3 can permit the flow of fuel from one or more pressure regulators, through the fuel selector valve 3 and into additional components. The additional components can be, for example, the heater control valve 130, the fluid flow controller 140, the nozzle 160, etc. In some embodiments, the additional components can comprise a control valve which comprises at least one of a manual valve, a thermostat valve, an AC solenoid, a DC solenoid and a flame adjustment motor. In various embodiments, the additional components may or may not comprise part of the heating source 10. The additional components can be configured to use the fuel, such as for combustion, and/or to direct one or more lines of fuel to other uses or areas of the heater 100, 100′ or other appliance.


Returning now to FIGS. 4A1-4B2, the functioning of the arm 38 and the actuation member 24 will be described in more detail. The actuation member 24 can have a varying or undulating surface that engages the arm 38. The arm 38 can move with the varying surface thereby changing the position of the arm 38. The arm 38 can be made from a resilient flexible material, such as metal or plastic, but can also be rigid. The arm as shown is a flexible material that can be moved and bent between positions with a resiliency to return to an unbent or less bent position. In other embodiments, the arm can be a linkage, a pinned rotating arm, a member suspended between the actuation member and the pressure regulator, etc. The arm 38 can be elongate, have spring qualities, be biased upwards, be a bent metal arm or beam, etc.


The actuation member 24 can have sections of different heights (H2, H4). For example, the actuation member 24 can include flat spots or sections with a diameter different than adjacent sections. As can be seen, the actuation member includes a flat portion 44 with a transition portion 46 that extends between the initial outer diameter of the cylindrical rod and the flat portion 44. Alternatively, the portion 44 can have smaller diameter than the initial outer diameter of the rod. The rod can extend along a longitudinal axis and have a plurality of longitudinal cross-sections of different shapes. The actuation member 24 can be a type of cam and can also be shapes, besides cylindrical, and can have a surface that varies to provide different heights to the arm 38 for engaging the arm and setting the pressure at the pressure regulator 16.


Looking now to FIG. 5A, a schematic diagram of a heating source with a fuel selector valve 3 is illustrated. The illustrated fuel selector valve 3 can be similar to that described above with reference to FIGS. 3A-4B2. A fuel source can be connected to the fuel selector valve 3 via one of the fuel source connections 12, 14. The act of connecting the fuel source to the fuel selector valve 3 can set the pressure regulator to the desired pressure if it is not already at the desired pressure. Thus, selecting the proper fuel source connection can determine and sometimes set the pressure at the pressure regulator. It will be understood that one fuel source connection may allow fluid to flow through a default or preset path while the other fuel source connection may change the path including changing other characteristics of the system along the path such as the pressure regulator setting. In some embodiments, both fuel source connections may change the path and/or other characteristics.


The fuel selector valve 3 can permit the flow of fuel from the pressure regulator 16 through the fuel selector valve 3 and then into additional components. The additional components can be, for example, the heater control valve 130, the fluid flow controller 140, the nozzle 160, etc. In some embodiments, the additional components can comprise a control valve which comprises at least one of a manual valve, a thermostat valve, an AC solenoid, a DC solenoid and a flame adjustment motor. In various embodiments, the additional components may or may not comprise part of the heating source 10. The additional components can be configured to use the fuel, such as for combustion, and/or to direct one or more lines of fuel to other uses or areas of the heater 100, 100′ or other appliance.



FIG. 5B illustrates a schematic diagram of another embodiment of a heating source with a fuel selector valve 3. The illustrated fuel selector valve can be similar to that described below with reference to FIGS. 18A-19B. A fuel source can be connected to the fuel selector valve 3 via one of the fuel source connections 12, 14. The act of connecting the fuel source to the fuel selector valve 3 can determine whether a flow path from either fuel source connection 12, 14 is open or closed.


The fuel selector valve 3 can be arranged such that fluid flowing from the second fuel source connection 14 passes through a pressure regulator through which fluid flowing from the first fuel source connection 12 does not pass. In some embodiments, as illustrated, the pressure regulator can be outside of the fuel selector valve, although in some embodiments it can be within it. As illustrated, fluid flowing through either fuel connection source can ultimately end up in the same line, from which the fluid can flow into additional components. As above, the additional components can be, for example, a heater control valve 130, a fluid flow controller 140, a nozzle 160, etc. In some embodiments, the additional components can comprise a control valve which comprises at least one of a manual valve, a thermostat valve, an AC solenoid, a DC solenoid and a flame adjustment motor. In various embodiments, the additional components may or may not comprise part of the heating source 10. The additional components can be configured to use the fuel, such as for combustion, and/or to direct one or more lines of fuel to other uses or areas of the heater 100, 100′ or other appliance.


In further embodiments, the fuel selector valve 3 can be arranged such that fluid flowing from the second fuel source connection 14 passes through a first pressure regulator and fluid flowing from the first fuel source connection 12 passes through a second pressure regulator. The pressure regulators can be either inside of or outside of the fuel selector valve. Similar to that illustrated in FIG. 5B, fluid flowing through either fuel connection source can ultimately end up in the same line, from which the fluid can flow into additional components.



FIGS. 5C and 5D show additional embodiments of heating source where selecting the fuel source connection can set additional parameters. The fuel selector valve of FIG. 5C includes a valve 48. The valve 48 has one inlet and two outlets, such that one outlet can be closed while the other is open. The valve 48 can have an initial position where one of the outlets is open and a secondary position where the other outlet is open. The selection of the fuel source connection can determine whether the valve is in the initial or secondary position. For example, selecting the first fuel source connection 12 can allow fuel flow through the initial configuration of the heating source, while selecting the second fuel source connection 14 can move the pressure regulator 16 and the valve 48 to their secondary configurations.


In other embodiments, the two outlets can both have separate open and closed positions with separate valves located at each outlet. Thus, the valve 48 can comprise two valves. The selection of the fuel source connection can determine which valve is opened. For example, selecting the first fuel source connection 12 can allow fuel flow through the initial configuration of the pressure regulator and can open the first valve at one of the outlets. Selecting the second fuel source connection 14 can move the pressure regulator 16 to its secondary configuration and open the second valve at the other of the outlets.



FIG. 5D illustrates a fuel selector valve having two valves 48, 50. In addition to setting the pressure regulator, selecting the fuel source connection can also determine how the fuel flows through the valves 48, 50. For example, one selection can allow the fuel to follow the upward arrows, while the other selection can allow the fuel to follow the downward arrows. In addition, the fuel selector valve can also direct the fuel out of the fuel selector valve after the pressure regulator 16, and then receive the fuel again. The fuel can be directed to other components 52 that then direct the fuel, or some of the fuel back to the fuel selector valve. It should be understood that the fuel selector valve show in FIG. 5C can also include other components 52 between the pressure regulator 16 and the valve 48. The heating source can include the fuel selector valve and one or more of the other components.


The other component 52 can preferably be a control valve. In some embodiments, the control valve can comprise at least one of a manual valve, a thermostat valve, an AC solenoid, a DC solenoid and a flame adjustment motor. For example the control valve 52 can include two solenoids. Each solenoid can control the flow of fuel to one of the valves 48, 50. The valves can then direct fuel to additional components such as a pilot light or oxygen depletion sensor and to a nozzle. In some embodiments, each line leaving the valve can be configured to direct a particular type of fuel to a component configured specific to that type of fuel. For example, one valve may have two lines with each line connected to a different nozzle. The two nozzles can each have a different sized orifice and/or air hole and each can be configured for a particular fuel type.


Turning now to FIGS. 6A and 6B, additional embodiments of heating sources are shown. The heating source of FIG. 6A is very similar to that shown in FIG. 5D. One difference is that the fuel selector valve of FIG. 6A includes two pressure regulators 16′. The two pressure regulators 16′ can be preset to a particular pressure or pressure range. As there is only one line leading to each pressure regulator, the pressure regulators do not need to be changeable between two different pressures as discussed above with reference to FIGS. 5A-5D. In addition, similar to FIGS. 5C and 5D, either one of the fuel source connections 12, 14 or both can determine and/or change a path through the fuel selector valve. For example, each of valves 48 and 50 can comprise one valve or two valves as described above.



FIG. 6B shows another embodiment where the control valve 52 returns two flows of fuel to the fuel selector valve. One flow of fuel is directed to a valve 48 and one flow passes through the fuel selector valve but does not have separate paths dependent on the fuel type.


In each of the embodiments shown in FIGS. 5A-6B, the fuel selector valve may also include valves in or near the fuel source connections 12, 14. This can help to control the flow of fuel into the fuel selector valve as has been previously discussed.


Turning now to FIGS. 7-9C, another embodiment of heating source 10 is shown. It will be understood that parts of this heating source can function in a similar manner to the heating source shown and described with reference to FIGS. 3A-4B2. Thus, similar reference numbers are used. For example, the pressure regulator 16 functions in the same way in both illustrated embodiments. In addition, the embodiment of FIGS. 7-9C is conceptually similar to the schematic diagram shown and described with reference to FIG. 5D.


Looking to FIG. 7, it can be seen that a control valve 52 having two solenoids 54, 56 is connected to the side of the fuel selector valve 3. The fuel selector valve also includes two valves 48, 50. FIGS. 8 and 8A show the fuel selector valve 3 in relation to the control valve 52. A fluid, such as fuel, can flow from one of the fuel source connections 12, 14 flows through the pressure regulator 16 to the control valve 52. The fluid flow will first encounter the first solenoid 54. The first solenoid 54 has a valve 58 that can control flow past the first solenoid 54. When the valve 58 is open, fluid can flow to both the second solenoid 56 and to the valve 48. The second solenoid 56 also has a valve 60 which can open or close to control fuel flow to the valve 50. In some embodiments, the valve 48 directs fuel to a pilot light or oxygen depletion sensor and the valve 50 directs fuel to a nozzle at a burner. Thus, it may be desirable direct fuel to be ignited at the pilot light first, before igniting or directing fuel to the burner. The control valve 52 can also control the amount of fuel flowing to burner. In some embodiments, the control valve can also include a manual valve that allows for manual as well as, or instead of, automatic control by an electric valve, such as the two solenoids shown.


As discussed, selecting one of the first and second fuel source connections 12, 14 can determine the flow path through the heating source. In particular, the actuation member 24 can move the valves 48 and 50 from an initial position to a secondary position in a manner similar to that described above with reference to the pressure regulator.


The fuel selector valve 3 can be used for selecting between two different fuels and for setting certain parameters, such as one or more flow paths, and/or a setting on one or more pressure regulators based on the desired and selected fuel. The fuel selector valve 3 can have a first mode configured to direct a flow of a first fuel (such as NG) in a first path through the fuel selector valve 3 and a second mode configured to direct a flow of a second fuel (such as LP) in a second path through the fuel selector valve 3.


The fuel selector valve 3 can further comprise first and second fuel source connections or hook-ups 12, 14. The fuel selector valve 3 can connect to one of two different fuel sources, each fuel source having a different type of fuel therein.


A pressure regulator 16 is positioned within the housing such that fluid entering the fuel selector valve 3 via either the first or second fuel source connection 12, 14 can be directed to the pressure regulator 16. Fuel from the pressure regulator 16 can then flow to the control valve 52 as discussed above. In some embodiments, the fuel selector valve 3 has two separate pressure regulators such that each fuel source connection directs fuel to a specific pressure regulator.


The fuel selector valve 3 can be configured to select one or more flow paths through the fuel selector valve 3 and/or to set a parameter of the fuel selector valve. For example, the fuel selector valve 3 may include two valves 48, 50, where the position of the valve can determine a flow path through the fuel selector valve 3. The fuel selector valve 3 can also control certain parameters of the pressure regulator 16.


With reference to FIGS. 9-9A2, it can be seen that the fuel selector valve 3 can include one or more actuation members 22, 24. The actuation members 22, 24 can be used for many purposes such as to select one or more flow paths through the fuel selector valve 3 and/or to set a parameter of the fuel selector valve. As shown, the actuation members are spring loaded rods that can be advanced in a linear motion.


The illustrated actuation member 22 has an end 26 positioned within the first fuel source connection 12. A connector 30 can be attached to the first fuel source connection 12 by advancing the connector into the first fuel source connection 12. This can force the actuation member end 26 into the housing of the fuel selector valve 3. This force then counteracts a spring force provided by a spring 32 to open a valve 34.


FIG. 9A1 shows the open valve 34 with the connector 30 attached to the first fuel source connection 12. The connector 30 can be part of a fuel source to provide fuel to the heater assembly 10. With the valve 34 in the open position, fuel from the fuel source can flow into the first fuel source connection 12, to the pressure regulator 16, then to the control valve 52 and then to one or both of the valves 48, 50 before finally leaving the fuel selector valve 3.


Alternatively, the connector 30 can be connected to the second fuel source connection 14 as shown in FIG. 9A2. This can open the valve 36 by pressing on the end 28 of the second actuation member 24. Fuel can then flow from the fuel source through the connector 30 into the fuel selector valve 3 and through the fuel selector valve 3 in the same manner as mentioned above.


The presence of two valves 34, 36, one at each fuel source connection 12, 14, can prevent fuel from exiting the fuel selector valve 3 undesirably, as well as preventing other undesirable materials from entering the fuel selector valve 3. In some embodiments, the fuel selector valve can utilize a cap or plug to block the unused fuel source connection. This may be in addition to or instead of one or more valves at the fuel source connections. For example, in some embodiments the actuation member 24 does not include a valve at the fuel source connection 14.


In addition to, or instead of, providing a valve 36 at the inlet or fuel source connection 14, the actuation member 24 can be in a position to control a parameter of the pressure regulator 16, such as by an arm 38 that extends between the actuation member 24 and the pressure regulator 16. The actuation member 24 can act on the arm, determining the position of the arm 38. The position of the arm 38 can then determine the height of the spring 40 within the pressure regulator. The height of the spring 40 can be a factor in determining the force required to move the diaphragm 42. The spring height can be used to set the pressure of the fluid flowing through the pressure regulator.


In addition to controlling the pressure regulator, the actuation member 24 can also control one or more valves, including valves 48, 50. The actuation member 24 can have a varying or undulating surface that engages the arms 38 as shown in FIGS. 9A1-9A2. The arms 38 can move with the varying surface thereby changing the position of the arms 38.


The actuation member 24 can include flat spots or sections with a diameter different than adjacent sections. As can be seen, the actuation member includes flat portions 44 with transition portions 46 that extend between the initial outer diameter of the cylindrical rod and the flat portions 44. Alternatively, the portion 44 can have a smaller diameter than the initial outer diameter of the rod. The rod can extend along a longitudinal axis and have a plurality of longitudinal cross-sections of different shapes. The actuation member 24 can be a type of cam and can also be shapes, besides cylindrical, and can have a surface that varies to provide different heights to the arms 38 for engaging the arms.


Looking now to FIGS. 9B and 9C, an embodiment of a valve 48 is shown. The valve 50 can function in a similar manner to that as will be described with reference to valve 48. The valves can also function in other ways as will be understood by one of skill in the art.


Valve 48 is shown having a valve body 62 that can control the fluid flow path and whether the flow exits the valve 48 through one of two outlets 70, 72. The valve body 62 can be seated against one of two different ledges 64, 66 surrounding an opening to either open or close the pathway 71, 73 to the respective outlet 70, 72. Fluid can enter the valve, such as from the control valve 52 as indicated by the dotted line. The position of the valve body 62 within the valve 48 can then determine whether the fluid exits via the first outlet 70 or the second outlet 72.


The valve body 62 can have a spring 32 to bias the valve body towards a first position as shown in FIG. 9B. In the first position, the outlet 72 is open and outlet 70 is closed, thus fluid will flow through flow path 73. In the second position shown in FIG. 9C, the outlet 72 is closed and the outlet 70 is open, thus fluid will flow through flow path 71. The valve body 62 can be made of one or more materials. The valve body 62 may include a solid core with a rubber or other elastic material to form the valve seat with the respective first or second ledge 64, 66.


The valve body 62 can also engage the arm 38 so that the position of the valve body 62 is controlled by the actuation member 24. As mentioned with respect to the pressure regulator, in some embodiments, the actuation member 24 can contact the valve body directly, without the use of an arm 38. Also, the arm 38 can take any form to allow the actuation member to control the position of the valve body within the valve 48.


The valve 48 can also include a diaphragm 68. The diaphragm 68 can be different from the diaphragm 42 in the pressure regulator (FIGS. 4B1 and 4B2) in that the diaphragm 68 is generally not used for pressure regulation. The diaphragm 68 can be a sheet of a flexible material anchored at its periphery that is most often round in shape. It can serve as a flexible barrier that allows the valve to be actuated from the outside, while sealing the valve body 62 and keeping the contents, namely the fuel, within the fuel selector valve.



FIG. 10 illustrates a perspective view of the heating source 10 where both the first valve 48 and the second valve 50 have two outlets and function in similar manners. Thus, the heating source 10, valve 48 and valve 50 can all function in the same or a similar manner as that described with respect to FIGS. 7-9C. FIGS. 10A and 10B show heating sources where the first valve 48 is different from the second valve 50. The valve 48 can be the same or similar to that described above and the valve 50 can be the same or similar to the valves described in more detail below. Further, in some embodiments the heating source can include only one valve. The heating source may still include one or more outlets at the area that does not include a valve.



FIGS. 11A and 11B show an embodiment of a valve 50 in cross-section. As one example, the illustrated valve 50 could be used in the heating source of FIG. 10A. The valve 50 has two channels or flow paths 78, 80 and a valve body 62′ that is positioned to open and close only one of the flow paths 80. Thus, the flow path 78 remains open so that when fuel is flowing from the control valve 52 to the valve 50, it will flow through flow path 78 and it may also flow through flow path 80. FIG. 11A shows the valve 50 with the valve body 62′ spaced away from the ledge 66 so that the valve and the flow path 80 are open. FIG. 11B shows the valve body 62′ seated at the ledge 66 so that the valve and the flow path 80 are closed. The flow path 78 remains open in both figures. There is also only one outlet 74 so both flow paths pass through the outlet 74.



FIG. 12 shows the valve 50 of FIG. 11A with a nozzle assembly 76 positioned within the outlet 74. The nozzle assembly 76 has a center orifice 82 and an outer orifice 84. The flow path 78 is in fluid communication with the center orifice 82 and the flow path 80 is in fluid communication with the outer orifice 84. The orifices can be single orifices, or a plurality of orifices. For example, the nozzle can have a single center orifice 82 and a plurality of orifices that surround the center orifice to make up the outer orifice 84.



FIG. 13 illustrates another embodiment of the fuel selector valve which is conceptually similar to the schematic diagram shown and described with reference to FIG. 6B. The fuel selector valve can have a valve 48 and then a separate flow path 86. Thus, a control valve 52 can return two flows of fuel to the fuel selector valve, one of which to the valve 48 and one to the flow path 86. The fuel in the flow path 86 can flow through the fuel selector valve without being controlled by have a valve 50 or without being directed down separate paths dependent on the fuel type. The fuel is simply directed out of the fuel selector valve.


Turning now to FIGS. 14-17, another embodiment of a heating source is shown which is conceptually similar to the schematic diagram shown and described with reference to FIG. 6A. As can best be seen in FIG. 15, both the first actuation member 22′ and the second actuation member 24′ are used to control valves at the inlets, but also the valves at the outlets of the fuel selector valve. In addition, the fuel selector valve includes two pressure regulators 16′, 16″ as can be seen in FIG. 16. The two pressure regulators 16′, 16″ can be preset to a particular pressure or pressure range and each of the fuel source connections 12, 14 can direct fluid flow to a specific pressure regulator. Thus, the pressure regulators do not need to be changeable between two different pressures as discussed previously.


The pressure settings of each pressure regulator 16′, 16″ can be independently adjusted by tensioning of a screw or other device 41 that allows for flow control of the fuel at a predetermined pressure or pressure range and selectively maintains an orifice open so that the fuel can flow through spring-loaded valve or valve assembly of the pressure regulator. If the pressure exceeds a threshold pressure, a plunger seat 43 can be pushed towards a seal ring 45 to seal off the orifice, thereby closing the pressure regulator.


Turning now to FIG. 17, one example of a valve 48′ is shown. The valve 48′ can comprise two separate valves that are each separately controllable by either the first actuation member 22′ or the second actuation member 24′. The selection of the fuel source connection can determine which valve is opened. For example, selecting the first fuel source connection 12 and advancing the first actuation member 22′ can allow fuel flow through a preset pressure regulator 16″ and can move the first valve body 62′ to the open position to allow flow through the outlet 70. Selecting the second fuel source connection 14 and advancing the second actuation member 24′ can allow fuel flow through a preset pressure regulator 16′ and can move the second valve body 62″ to the open position to allow flow through the outlet 72. It is anticipated that only one of the fuel source connections will be selected, though it is possible that in certain configurations, both fuel source connections could be in use.


The fuel selector valve may also include valves in or near the fuel source connections 12, 14. This can help to control the flow of fuel into the fuel selector valve as has been previously discussed.


As before, it will be understood that the valve 50′ can be similar to valve 48′ or can have a different configuration. For example, the valve 50′ may have one or two outlets and it may include a nozzle in the one outlet.


Turning now to FIGS. 18A-19B, another embodiment of an inlet or fuel selector valve 3 is shown. It will be understood that parts of this valve can function in a similar manner to the heating sources and valves shown and described above. Thus, similar reference numbers are used. In addition, the embodiment of FIGS. 18A-19B is conceptually similar to and can be used in arrangements illustrated in the schematic diagram shown and described with reference to FIG. 5B, although it is not limited to such arrangements.



FIG. 18A illustrates a perspective view of a fuel selector valve 3. The valve can include a first inlet 12, a second inlet 14, a first outlet 18, and a second outlet 19. As illustrated in FIG. 18B, a cutaway of the image of FIG. 18A, in some embodiments the first inlet can correspond with the first outlet and the second inlet can correspond with the second outlet. The first inlet can connect to the first outlet via a first flow path 71, and the second inlet can connect to the second outlet via a second flow path 73. In some embodiments, the first and second flow paths can be distinct within the valve, such that there is no fluid communication between the first and second flow paths within the valve 3.


With continuing reference to FIG. 18B, the fuel selector valve 3 can include an actuation member 22. The actuation member preferably extends from the first flow path 71 to the second flow path 73. In some embodiments, as illustrated, the actuation member can comprise a rod 22. In some embodiments, the actuation member can comprise a first valve member 34 and a second valve member 36. With two valve members, the actuation member can allow for one flow path to be open while the other is closed. The actuation member can be biased to a first position where at least one of the valve members is seated to close the flow path. Advancing the actuation member can open a seated valve member and ensure that the other valve member is closed.


In some embodiments, the first valve member can include a sealing section 35 that can be configured to seat against a first ledge 64, closing the first outlet 18 and blocking or substantially blocking fluid communication along the first flow path 71 between the first inlet 12 and the first outlet 18. Similarly, the second valve member can include a sealing section 37 that can be configured to seat against a second ledge 66, closing the second outlet 19 and blocking or substantially blocking fluid communication along the second flow path 73 between the second inlet 14 and the second outlet 19.


In some embodiments, the actuation member can have a first position in which the second valve member 36 closes the second flow path 73 (i.e., by closing or substantially closing the second inlet 14 and/or the second outlet 19). The first flow path 71 can be open with the actuation member in the first position. The actuation member can also have a second position in which the first valve member 34 closes the first flow path 71 (i.e., by closing or substantially closing the first inlet 12 and/or the first outlet 18). The second flow path 73 can be open with the actuation member in the first position.


In some embodiments, the actuation member 22 can comprise a first biasing member 32, such as a spring, configured to bias the actuation member toward the first position. As shown, the first biasing member may be within the first flow path 71. In some embodiments, the actuation member 22 can comprise a second biasing member 33, such as a spring. The second spring can configured to bias the actuation member toward the first position and/or can be used to prevent the actuation member from bottoming out on a wall of the housing. The second biasing member can be within the second flow path 73. In some embodiments, the actuation member can have only a single biasing member configured to bias the actuation member toward the first position.


In some embodiments the actuation member can have a first end 26 that extends at least partially into the second inlet 14. The first end can be configured such that when a connector, such as of a source of fuel, connects to the second inlet 14, the connector will move the first end. In some embodiments, moving the first end can include moving the actuation member 22 into the second position. Thus, in some embodiments and as illustrated, the actuation member 22 can be biased into the first position in which the second inlet 14 can be closed or substantially closed, and connecting a source of fuel to the second inlet can open the second inlet 14 and close or substantially close the first outlet 18. In some embodiments, the first end 26 of the actuation member can extend at least partially into the first inlet 12, and connecting a source of fuel to the first inlet can move the actuation member from the first position to the second position. In some embodiments, a first source of fuel can be liquid propane and a second source of fuel can be natural gas.



FIGS. 19A and 19B illustrate cross-sectional views of the fuel selector valve 3. In FIG. 19A the actuation member 22 is in the first position, and in FIG. 19B the actuation member is in the second position. As described above, and as illustrated in FIG. 19A, in the first position the second sealing section 37 of the second valve member 36 can seat against a second ledge 66, substantially closing the second inlet 14. The first valve member 34 can be spaced from the first ledge 64, such that a gap can exist between the first sealing section 35 and the first ledge 64, allowing fluid to flow through an open first outlet 18.


In the second position, illustrated in FIG. 19B, the actuation member has moved such that a gap exists between the second sealing section 37 and the second ledge 66, allowing fluid to flow through the open second inlet 14. Also in the second position, the first valve member 34 can seat against the first ledge 64, substantially closing the first outlet 18.


In some embodiments, the fuel selector valve 3 can have two inlets and one outlet. The actuation member 22 can be positioned as described above, but the first outlet 18 can be an inlet and the second outlet 19 and the first inlet 12 can be combined into a single connected outlet. The actuation member can take other forms as well that allows for one inlet to be closed, while the other is opened.


Turning now to FIGS. 20-23, another embodiment of an inlet or fuel selector valve 3 is shown. It will be understood that parts of this valve can function in a similar manner to the heating sources and valves shown and described above. Thus, similar reference numbers are used. In some embodiments, the fuel selector valve 3 can be configured such that inlets of the valve are only open when they are connected to a source of fuel, as described in more detail below.



FIG. 20 illustrates an external view of a fuel selector valve 3 that can have a first inlet 12 and a second inlet 14. Both inlets can have an actuation member with an end that can at least partially enter the inlet and close or substantially close the inlet. For example, as illustrated, the first inlet 12 can have a first actuation member with an end 26 that blocks the inlet. Similarly, the second inlet 14 can have a second actuation member with an end 28 that blocks the inlet.



FIG. 21 illustrates a cross sectional view of the fuel selector valve 3 that shows a first actuation member 22 with the end 26 and the second actuation member 24 with the end 28. As described with respect to various embodiments above, the actuation members can have sealing sections 35, 37 that can seat against respective ledges 64, 66 to close or substantially close their respective inlets 12, 14. Thus, the first actuation member 22 can have a first position in which the sealing section 35 of the first actuation member seats against the first ledge 64. Similarly, the second actuation member 24 can have a first position in which the sealing section 37 of the second actuation member seats against the second ledge 66. Each actuation member preferably has a biasing member, such as a spring 32, 34, that biases the actuation member toward the first position.


As described in various embodiments above, when a connector, such as of a source of fuel, connects to one of the inlets, it can move the actuation member into a second position that allows fluid to flow through the inlet. FIGS. 22A and 22B illustrate a connector of a source of fuel connected to the first inlet 12 and to the second inlet 14, respectively.


In FIG. 22A, the connector 30 has moved the first actuation member 22 away from the first ledge 64 into the second position, creating a gap that allows fluid to flow along a first flow path 71. In FIG. 22B, the connector 30 has moved the second actuation member 24 away from the second ledge 66 into the second position, creating a gap that allows fluid to flow along a second flow path 73. In some embodiments, the first and second flow paths 71, 73 can pass through respective pressure regulators 16′, 16″.



FIG. 23 illustrates a cross sectional view of the fuel selector valve that shows the first inlet 12 and a first pressure regulator 16′. The first pressure regulator can function similarly to various embodiments of pressure regulators described above. Similarly, a second pressure regulator 16″ through which the second flow path 73 passes can function the same as the first pressure regulator.


As with some pressure regulators described above, the pressure settings of each pressure regulator 16′, 16″ can be independently adjusted by tensioning of a screw or other device 41 that allows for flow control of the fuel at a predetermined pressure or pressure range (which can correspond to a height of a spring 40) and selectively maintains an orifice open so that the fuel can flow through a spring-loaded valve or valve assembly of the pressure regulator. If the pressure exceeds a threshold pressure, a plunger seat 43 can be pushed towards a seal ring 45 to seal off the orifice, thereby closing the pressure regulator.


Each of the fuel selector valves described herein can be used with a pilot light or oxygen depletion sensor, a nozzle, and a burner to form part of a heater or other gas appliance. The different configurations of valves and controls such as by the actuation members can allow the fuel selector valve to be used in different types of systems. For example, the fuel selector valve can be used in a dual fuel heater system with separate ODS and nozzles for each fuel. The fuel selector valve can also be used with nozzles and ODS that are pressure sensitive so that can be only one nozzle, one ODS, or one line leading to the various components from the fuel selector valve.


According to some embodiments, a heater assembly can be used with one of a first fuel type or a second fuel type different than the first. The heater assembly can include a pressure regulator having a first position and a second position and a housing having first and second fuel hook-ups. The first fuel hook-up can be used for connecting the first fuel type to the heater assembly and the second hook-up can be used for connecting the second fuel type to the heater assembly. An actuation member can be positioned such that one end is located within the second fuel hook-up. The actuation member can have a first position and a second position, such that connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to the second position. This can cause the pressure regulator to move from its first position to its second position. As has been discussed, the pressure regulator in the second position can be configured to regulate a fuel flow of the second fuel type within a predetermined range.


The heater assembly may also include one or more of a second pressure regulator, a second actuation member, and one or more arms extending between the respective actuation member and pressure regulator. The one or more arms can be configured to establish a compressible height of a pressure regulator spring within the pressure regulator.


A heater assembly can be used with one of a first fuel type or a second fuel type different than the first. The heater assembly can include at least one pressure regulator and a housing. The housing can comprise a first fuel hook-up for connecting the first fuel type to the heater assembly, and a second fuel hook-up for connecting the second fuel type to the heater assembly. The housing can also include a first inlet, a first outlet, a second outlet configured with an open position and a closed position, and a first valve configured to open and close the second outlet. A first actuation member having an end located within the second fuel hook-up and having a first position and a second position can be configured such that connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to the second position which causes the first valve to open the second outlet, the second outlet being in fluid communication with the second fuel hook-up.


The first actuation member can be further configured such that connecting the fuel source to the heater assembly at the second fuel hook-up moves the first actuation member from the first position to the second position which causes the at least one pressure regulator to move from a first position to a second position, wherein the at least one pressure regulator in the second position is configured to regulate a fuel flow of the second fuel type within a predetermined range.


The at least one pressure regulator can comprises first and second pressure regulators, the first pressure regulator being in fluid communication with the first fuel hook-up and the second pressure regulator being in fluid communication with the second fuel hook-up.


Similarly, the first valve can be configured to open and close both the first and second outlets or there can be a second valve configured to open and close the first outlet. The housing may include addition, inlets, outlets and valves. Also a second actuation member may be used positioned within the first fuel hook-up.


Turning now to FIGS. 24-26, another embodiment of a heating assembly is shown that is similar to that shown in FIGS. 2C and 18A-19B. The components of the heater assembly can be the same or substantially similar to similar components in previously-described embodiments; thus, similar reference numbers are used.



FIG. 24 illustrates a detailed view of embodiments of a fuel selector valve 3 and burners 190′, among other features. The heating assembly of FIG. 24 can be used, for example, with the BBQ 100′ of FIG. 2A.


As illustrated, in some embodiments the fuel selector valve 3 can have a first outlet 18 that is part of a first flow path 71, and a second outlet 19 that is part of a second flow path 73. The first and second flow paths can intersect at a common or shared flow path 75. In some embodiments, the second flow path 73 can pass through a pressure regulator 16 before joining with the first flow path 71. In still other embodiments, both flow paths can pass through a designated pressure regulator before joining together.


The heating assembly can include a fuel selector valve 3. Where the heater is a dual fuel heater, either a first or second fuel can be introduced into the heater through the fuel selector valve. The fuel can flow to one or more burners 190′. In some embodiments, the heater can have one or more different types and/or sizes of burners 190′. As shown, the heating assembly has a number of burners 190′ to be positioned within a BBQ grill, as well as a side burner. In some embodiments, one or more of the burners 190′ can have a control valve 130′ associated with it, and/or have a burner cover. In some embodiments a control valve 130′ can include a knob.


The control valves 130′ can be any number of different designs, including those disclosed in U.S. application Ser. No. 13/791,652 (PROCUSA.088P1) filed Mar. 8, 2013, published as US 2013/0186492, for example, those shown in FIGS. 25A-27B and 45-50B, the entire application of which is incorporated herein and made a part of this specification.


Looking now to FIGS. 25-26, the embodiment of an inlet or fuel selector valve 3 of FIG. 24 is shown in more detail. It will be understood that the fuel selector valve 3 is very similar to that shown and described with reference to FIGS. 18A-19B. One difference between the two valves is the addition of a low pressure cut-off switch 88. Adding a low pressure cut-off switch 88 to the high pressure inlet 12 of the fuel selector valve can improve the overall utility of the pressure selector valve by avoiding erroneous operation under a low inlet pressure condition. Such a condition may be present for example, when the gas is supplied from a propane tank 90 that is reaching depletion. Even if the tank 90 has a separate pressure regulator 16 (see FIG. 24) the fuel may still be supplied at a pressure that is lower than required or desired for operation of the heater, such as a BBQ.


The low pressure cut-off switch 88 as shown in FIG. 25, can include a valve member 92 biased to a closed position and engaged with a valve seat 94. As shown, it can also include a diaphragm 96 and a spring 98. The fuel can act on the diaphragm 96 to open the valve 92 at a pre-set pressure. The low pressure cut-off switch 88 can also include a vent 102 to help ensure proper movement of the diaphragm and a screw 104 to calibrate the tension on the spring. The valve member 92 can be made of a flexible rubber like material to help ensure a proper seat is maintained with the valve seat 94. In some embodiments, the valve member 92 and diaphragm 96 are combined in a single part.



FIG. 25A shows the fuel selector valve 3 under a low pressure condition. The low pressure cut-off switch 88 remains closed so that fuel from the first inlet 12 is prevented from exiting the selector valve. FIG. 25B shows a higher pressure condition. As shown, the higher pressure fuel opens the low pressure cut-off switch 88 to allow fuel to flow from the first inlet 12 to the first outlet 18 along flow path 71.


In FIG. 26, a different fuel source is connected to the second inlet 14. This moves the internal valve allowing fuel flow between the second inlet 14 and the second outlet 19 along flow path 73 while closing the path between the first inlet 12 and outlet 18.


As shown, the fuel selector valve 3 can include a first inlet 12, a second inlet 14, a first outlet 18, and a second outlet 19. The first inlet can correspond with the first outlet and the second inlet can correspond with the second outlet. The first inlet can connect to the first outlet via a first flow path 71, and the second inlet can connect to the second outlet via a second flow path 73. In some embodiments, the first and second flow paths can be distinct within the valve, such that there is no fluid communication between the first and second flow paths within the valve.


The fuel selector valve can include an actuation member 22. The actuation member preferably extends from the first flow path to the second flow path. In some embodiments, as illustrated, the actuation member can comprise a rod. In some embodiments, the actuation member can comprise a first valve member 34 and a second valve member 36. With two valve members, the actuation member can allow for one flow path to be open while the other is closed. The actuation member can be biased to a first position where at least one of the valve members is seated to close the flow path. Advancing the actuation member can open a seated valve member and ensure that the other valve member is closed.


In some embodiments, the first valve member can include a sealing section 35 that can be configured to seat against a first ledge 64, closing the first outlet 18 and blocking or substantially blocking fluid communication along the first flow path 71 between the first inlet 12 and the first outlet 18. Similarly, the second valve member can include a sealing section 37 that can be configured to seat against a second ledge 66, closing the second outlet 9 and blocking or substantially blocking fluid communication along the second flow path 73 between the second inlet 14 and the second outlet 19.


In some embodiments, the actuation member can have a first position in which the second valve member 36 closes the second flow path 73 (i.e., by closing or substantially closing the second inlet 14 and/or the second outlet 19). The first flow path 71 can be open with the actuation member in the first position. The actuation member can also have a second position in which the first valve member 34 closes the first flow path 71 (i.e., by closing or substantially closing the first inlet and/or the first outlet). The second flow path 73 can be open with the actuation member in the first position.


In some embodiments, the actuation member 22 can comprise a first biasing member 32, such as a spring, configured to bias the actuation member toward the first position. As shown, the first biasing member may be within the first flow path. In some embodiments, the actuation member 22 can comprise a second biasing member 33, such as a spring. The second spring can configured to bias the actuation member toward the first position and/or can be used to prevent the actuation member from bottoming out on a wall of the housing. The second biasing member can be within the second flow path. In some embodiments, the actuation member can have only a single biasing member configured to bias the actuation member toward the first position.


In some embodiments the actuation member can have a first end 26 that extends at least partially into the second inlet 14. The first end can be configured such that when a connector, such as of a source of fuel, connects to the second inlet, the connector will move the first end. In some embodiments, moving the first end can include moving the actuation member into the second position. Thus, in some embodiments and as illustrated, the actuation member can be biased into the first position in which the second inlet can be closed or substantially closed, and connecting a source of fuel to the second inlet can open the second inlet and close or substantially close the first outlet. In some embodiments, the first end of the actuation member can extend at least partially into the first inlet, and connecting a source of fuel to the first inlet can move the actuation member from the first position to the second position. In some embodiments, a first source of fuel can be liquid propane and a second source of fuel can be natural gas.


In FIGS. 25A and 25B the actuation member 22 is in the first position and in FIG. 26 the actuation member 22 is in the second position. As described above, and as illustrated, in the first position the second sealing section of the second valve member can seat against a second ledge, substantially closing the second inlet. The first valve member can be spaced from the first ledge, such that a gap can exist between the first sealing section and the first ledge, allowing fluid to flow through an open first outlet.


In the second position, illustrated in FIG. 26, the actuation member has moved such that a gap exists between the second sealing section and the second ledge, allowing fluid to flow through the open second inlet. Also in the second position, the first valve member can seat against the first ledge, substantially closing the first outlet.


In some embodiments, the fuel selector valve can have two inlets and one outlet. The actuation member can be positioned as described above, but the first outlet can be an inlet and the second outlet and the first inlet can be combined into a single connected outlet. The actuation member can take other forms as well that allows for one inlet to be closed, while the other is opened.


Turning now to FIGS. 27-30, another embodiment of a heating assembly is shown that is most similar to that shown in FIGS. 24-26. The components of the heater assembly can be the same or substantially similar to similar components in previously-described embodiments; thus, similar reference numbers are used.


One difference between the two heating assemblies is the combination of a pressure regulator 16 and some of the flow paths into the fuel selector valve 3, such that the fuel selector valve 3 has a single outlet 106. Thus, as can be seen with reference to FIG. 28, the first and second flow paths 71, 73 are internal to the fuel selector valve 3 and the flow path 75 starts within the fuel selector valve 3.



FIG. 27 illustrates a detailed view of embodiments of a fuel selector valve 3 and burners 190′, among other features. The heating assembly of FIG. 27 can be used, for example, with the BBQ 100′ of FIG. 2A.


Looking now to FIG. 28, the embodiment of an inlet or fuel selector valve 3 of FIG. 27 is shown in more detail. It can be seen that the illustrated fuel selector valve 3 includes two inlets 12, 14, a low pressure cut-off switch 88, actuation member 22, a pressure regulator 16 and an outlet 106.


It will be understood that the pressure regulator 16 can include components similar to the low pressure cut-off switch 88 as shown in FIG. 28. Thus, the pressure regulator can include a valve member 92, a valve seat 94, a diaphragm 96 and a spring 98. It can also include a vent 102 to help ensure proper movement of the diaphragm and a screw 104 to calibrate the tension on the spring.



FIGS. 29A-30, similar to FIGS. 25A-26 show the fuel selector valve 3 1) under a low pressure condition with fuel coming from the first inlet 12, 2) under a higher pressure condition with fuel coming from the first inlet 12, and 3) with fuel coming from the second inlet 14. In FIG. 29A under the low pressure condition, the low pressure cut-off switch 88 remains closed so that fuel from the first inlet 12 is prevented from exiting the selector valve. In FIG. 29B, the higher pressure fuel opens the low pressure cut-off switch 88 to allow fuel to flow from the first inlet 12 to the first outlet 18 along flow path 71.


In FIG. 30, a different fuel source is connected to the second inlet 14. This moves the internal valve allowing fuel flow between the second inlet 14 and the second outlet 19 along flow path 73 while closing the path between the first inlet 12 and outlet 18.


Although this invention has been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the present invention extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the invention and obvious modifications and equivalents thereof. In addition, while a number of variations of the invention have been shown and described in detail, other modifications, which are within the scope of this invention, will be readily apparent to those of skill in the art based upon this disclosure. It is also contemplated that various combinations or sub-combinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the invention. Accordingly, it should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed invention. Thus, it is intended that the scope of the present invention herein disclosed should not be limited by the particular disclosed embodiments described above, but should be determined only by a fair reading of the claims that follow.


Similarly, this method of disclosure, is not to be interpreted as reflecting an intention that any claim require more features than are expressly recited in that claim. Rather, as the following claims reflect, inventive aspects lie in a combination of fewer than all features of any single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment.

Claims
  • 1. A heater assembly for use with one of a first fuel type or a second fuel type different than the first, the heater assembly comprising: a housing having first and second fuel hook-ups, the first fuel hook-up for connecting a first fuel type to the heater assembly and the second fuel hook-up for connecting a second fuel type to the heater assembly;a first flow path from the first fuel hook-up and a second flow path from the second fuel hook-up;an actuation member comprising a first valve member positioned within the first flow path and a second valve member positioned within the second flow path, the actuation member having an end located at the second fuel hook-up, wherein the actuation member is configured such that in a first position one of the first flow path and the second flow path is open and the other is closed, and connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to a second position which opens the closed flow path from the first position and closes the open flow path from the first position; anda low pressure cut-off switch positioned in the first flow path.
  • 2. The heater assembly of claim 1, wherein the heater assembly further comprises a pressure regulator and the second flow path passes through the pressure regulator before joining with the first flow path.
  • 3. The heater assembly of claim 2, wherein the housing is an inlet valve housing that comprises a first outlet wherein the first flow path and the second flow path connect within the inlet valve housing so that fuel flow from the first flow path and the second flow path leaves the outlet.
  • 4. The heater assembly of claim 1, wherein in the first position the first flow path is open and the second flow path is closed.
  • 5. The heater assembly of claim 1, further comprising a spring operatively coupled to the actuation member to bias the actuation member towards the first position.
  • 6. The heater assembly of claim 1, wherein the actuation member comprises a rod configured for linear advancement from the first position to the second position.
  • 7. The heater assembly of claim 1, wherein the housing comprises a first seat configured to engage the first valve member in order to substantially close the first flow path.
  • 8. The heater assembly of claim 1, further comprising a plurality of burners connected to the main flow path.
  • 9. The heater assembly of claim 8, further comprising a control valve associated with each of the plurality of burners.
  • 10. A heater assembly for use with one of a first fuel type or a second fuel type different than the first, the heater assembly comprising: an inlet valve housing comprising: first and second fuel hook-ups, the first fuel hook-up for connecting a first fuel type to the heater assembly and the second fuel hook-up for connecting a second fuel type to the heater assembly;an outlet;a low pressure cut-off switch;a pressure regulator; andan actuation member;wherein the inlet valve housing defines a first flow path from the first fuel hook-up to the outlet and a second flow path from the second fuel hook-up to the outlet, the low pressure cut-off switch within the first flow path and the pressure regulator within the second flow path;wherein the actuation member is configured to move between a first position wherein the actuation member substantially closes the second flow path and a second position wherein the actuation member substantially closes the first flow path, wherein connecting a fuel source to the heater assembly at the second fuel hook-up moves the actuation member from the first position to the second position.
  • 11. The heater assembly of claim 10, wherein the actuation member comprises a rod configured for linear advancement from the first position to the second position.
  • 12. The heater assembly of claim 10, wherein the first fuel hook-up is a male inlet.
  • 13. The heater assembly of claim 10, wherein the second fuel hook-up is a female inlet.
  • 14. The heater assembly of claim 10, further comprising a control valve and a burner, the control valve in fluid communication with the outlet and configured to direct fuel flow to the burner.
Priority Claims (8)
Number Date Country Kind
2011 2 0401676 U Oct 2011 CN national
2012 1 0223977 Jul 2012 CN national
2012 1 0224414 Jul 2012 CN national
2012 2 0314766 U Jul 2012 CN national
2012 2 0315268 U Jul 2012 CN national
2012 1 0336108 Sep 2012 CN national
2012 2 0463373 U Sep 2012 CN national
2015 1 0977056 Dec 2015 CN national
CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. application Ser. No. 13/791,667 (PROCUSA.100A) filed Mar. 8, 2013 which claims priority to Chinese Pat. Appl. Nos. 201210336108.9 and 201220463373.9, both filed Sep. 13, 2012. U.S. application Ser. No. 13/791,667 also claims priority to U.S. Provisional Appl. No. 61/748,044 (PROCUSA.100PR) filed Dec. 31, 2012. This application claims priority to U.S. Provisional Appl. No. 62/216,807 (PROCUSA.100PR2) filed Sep. 10, 2015. This application claims priority to Chinese Pat. Appl. No. 201510977056.7 filed Dec. 23, 2015. This application claims priority to U.S. Provisional Appl. No. 62/322,746 (PROCUSA.100PR3) filed Apr. 14, 2016. This application is also a continuation-in-part of U.S. application Ser. No. 13/791,652 (PROCUSA.088P1) filed Mar. 8, 2013 which claims priority to Chinese Pat. Appl. Nos. 201210223977.0, 201220314766.3, 201210224414.3, 201220315268.0 all filed Jul. 2, 2012. U.S. application Ser. No. 13/791,652 is also a continuation-in-part of U.S. patent application Ser. No. 13/310,664 (PROCUSA.088A), filed Dec. 2, 2011, which issued as U.S. Pat. No. 8,985,094 on Mar. 24, 2015, and which claims priority to U.S. Provisional Application No. 61/473,714 (PROCUSA.070PR4), filed Apr. 8, 2011, and Chinese Pat. Appl. No. 201120401676.3, filed Oct. 20, 2011. U.S. application Ser. No. 13/791,652 also claims priority to U.S. Provisional Application No. 61/748,052 (PROCUSA.088PR), filed Dec. 31, 2012. The entire contents of all of the above applications are hereby incorporated by reference and made a part of this specification. Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet as filed with the present application, are hereby incorporated by reference under 37 CFR 1.57.

US Referenced Citations (384)
Number Name Date Kind
188740 Murphy et al. Mar 1877 A
743714 Guess Nov 1903 A
1051072 Bradley Jan 1913 A
1216529 Wilcox Feb 1917 A
1574234 Cumner Feb 1926 A
1589386 Harper Jun 1926 A
1639115 Smith Aug 1927 A
1639780 Mulholland Aug 1927 A
1697865 Hahn et al. Jan 1929 A
1729819 Campbell Oct 1929 A
1755639 Fawcett Apr 1930 A
1860942 Morse May 1932 A
1867110 Signore Jul 1932 A
1961086 Sherman et al. May 1934 A
2054588 Stephens Sep 1936 A
2088685 Birch Aug 1937 A
2095064 Harper Oct 1937 A
2108299 Steffen Feb 1938 A
2120864 Kagi Jun 1938 A
2160264 Furlong May 1939 A
2161523 Moecker, Jr. et al. Jun 1939 A
2231460 Barman Feb 1941 A
2319676 Guelson May 1943 A
2354286 Whaley, Jr. Jul 1944 A
2380956 Evarts Aug 1945 A
2397670 Krugler Apr 1946 A
2422368 Ray Jun 1947 A
2443892 Caparone Jun 1948 A
2464697 Logan et al. Mar 1949 A
2518894 Hurnbarger et al. Aug 1950 A
2556337 Paille Jun 1951 A
2560245 Ramsaur et al. Jul 1951 A
2578042 Chandler Dec 1951 A
2588485 Clarke et al. Mar 1952 A
2630821 Arey et al. Mar 1953 A
2641273 Siebens Jun 1953 A
2661157 Reichelderfer Dec 1953 A
2678066 Coolidge May 1954 A
2685294 Gold Aug 1954 A
2687140 St. Clair et al. Aug 1954 A
2693812 Jones Nov 1954 A
2716470 Focht Aug 1955 A
2750997 Reuter Jun 1956 A
2817362 Antrim, Jr. Dec 1957 A
2829674 Segelhorst Apr 1958 A
2844166 Edman Jul 1958 A
2853098 Fritzsche Sep 1958 A
2899980 Loebel Aug 1959 A
2905361 Noall Sep 1959 A
2907348 Gerteis Oct 1959 A
2966920 Oglesby et al. Jan 1961 A
2969924 Jay Jan 1961 A
3001541 St. Clair et al. Sep 1961 A
3032096 Stout et al. May 1962 A
3054529 Billington Sep 1962 A
3067773 Olander Dec 1962 A
3083721 Matthews et al. Apr 1963 A
3100504 Kauer, Jr. Aug 1963 A
3115330 Dollison Dec 1963 A
3120243 Allen Feb 1964 A
3139879 Bauer et al. Jul 1964 A
3207169 Miller Sep 1965 A
3244193 Loveless Apr 1966 A
3282323 Mandius Nov 1966 A
3331392 Davidson et al. Jul 1967 A
3357443 Brumm Dec 1967 A
3386656 Bergquist Jun 1968 A
3417779 Golay Dec 1968 A
3430655 Forney Mar 1969 A
3504663 Edwards Apr 1970 A
3550613 Barber Dec 1970 A
3552430 Love Jan 1971 A
3577877 Warne May 1971 A
3578015 Andersen May 1971 A
3578243 Love May 1971 A
3590806 Locke Jul 1971 A
3630652 Nutten et al. Dec 1971 A
3633606 Hay Jan 1972 A
3654948 Nelson Apr 1972 A
3693655 Frisk Sep 1972 A
3734132 Kuhnelt May 1973 A
3747629 Bauman Jul 1973 A
3768514 Goto Oct 1973 A
3800830 Etter Apr 1974 A
3802454 Kleuters Apr 1974 A
3804109 Martin et al. Apr 1974 A
3814570 Guiges et al. Jun 1974 A
3814573 Karlovetz Jun 1974 A
3825027 Henderson Jul 1974 A
3829279 Qualley et al. Aug 1974 A
3843310 Massi Oct 1974 A
3884413 Berquist May 1975 A
RE28447 Bonner et al. Jun 1975 E
3939871 Dickson Feb 1976 A
3977423 Clayton Aug 1976 A
4005724 Courtot Feb 1977 A
4005726 Fowler Feb 1977 A
D243694 Faulkner Mar 1977 S
4021190 Dickson May 1977 A
4067354 St. Clair Jan 1978 A
4067358 Streich Jan 1978 A
4081235 Van Der Veer Mar 1978 A
4101257 Straitz, III Jul 1978 A
4146056 Buchanan Mar 1979 A
4157238 Van Berkum Jun 1979 A
4171712 DeForrest Oct 1979 A
4181154 Oley et al. Jan 1980 A
4251025 Bonne et al. Feb 1981 A
4253493 English Mar 1981 A
4290450 Swanson Sep 1981 A
4301825 Simko Nov 1981 A
4348172 Miller Sep 1982 A
4355659 Kelchner Oct 1982 A
4359284 Kude et al. Nov 1982 A
4386625 Perkins et al. Jun 1983 A
4453568 Canalizo Jun 1984 A
4454892 Chadshay Jun 1984 A
4465456 Hynek Aug 1984 A
4474166 Shaftner et al. Oct 1984 A
4515554 Sirand May 1985 A
4538644 Knutson et al. Sep 1985 A
4566488 Chow et al. Jan 1986 A
4610425 Kelly Sep 1986 A
4625762 Hassanzadeh Dec 1986 A
4653530 Kelly Mar 1987 A
4660595 Kuster et al. Apr 1987 A
4683864 Bucci Aug 1987 A
4705330 Tindall Nov 1987 A
4718448 Love et al. Jan 1988 A
4718846 Oguri et al. Jan 1988 A
4768543 Wienke et al. Sep 1988 A
4768947 Adachi Sep 1988 A
4782814 Cherryholmes Nov 1988 A
4787414 Kelly Nov 1988 A
4796652 Hafla Jan 1989 A
4848133 Paulis et al. Jul 1989 A
4850530 Uecke Jul 1989 A
4874006 Iqbal Oct 1989 A
4895184 Abbey Jan 1990 A
4930538 Browne Jun 1990 A
4944324 Kajino et al. Jul 1990 A
4958771 Klomp Sep 1990 A
4965707 Butterfield Oct 1990 A
5025990 Ridenour Jun 1991 A
5027854 Genbauffe Jul 1991 A
5040567 Nestler Aug 1991 A
5044390 Kelly et al. Sep 1991 A
5048563 Buchanan et al. Sep 1991 A
5063956 Borcuch et al. Nov 1991 A
5090451 Buchanan et al. Feb 1992 A
5090899 Kee Feb 1992 A
5097818 Kee et al. Mar 1992 A
5172728 Tsukazaki Dec 1992 A
5189991 Hurnburg Mar 1993 A
5239979 Maurice et al. Aug 1993 A
5245997 Bartos Sep 1993 A
5251823 Joshi et al. Oct 1993 A
5278936 Shao Jan 1994 A
5326029 Schultz Jul 1994 A
5353766 Peters et al. Oct 1994 A
5379794 Browne Jan 1995 A
5413141 Dietiker May 1995 A
5452709 Mealer Sep 1995 A
5458294 Zachary et al. Oct 1995 A
5470018 Smith Nov 1995 A
5494072 Schinowsky Feb 1996 A
5513798 Tavor May 1996 A
5520206 Deville May 1996 A
5542609 Myers et al. Aug 1996 A
5544538 Takagi et al. Aug 1996 A
5567141 Joshi et al. Oct 1996 A
5584680 Kim Dec 1996 A
5591024 Eavenson et al. Jan 1997 A
5603211 Graves Feb 1997 A
5630408 Versluis May 1997 A
5634491 Benedict Jun 1997 A
5642580 Hess et al. Jul 1997 A
5645043 Long et al. Jul 1997 A
5653257 Johnston Aug 1997 A
5674065 Grando et al. Oct 1997 A
5706859 Backlund Jan 1998 A
D391345 Mandir et al. Feb 1998 S
5782626 Joos et al. Jul 1998 A
5785075 Uchida et al. Jul 1998 A
5787874 Krohn et al. Aug 1998 A
5787928 Allen et al. Aug 1998 A
5795145 Manning et al. Aug 1998 A
5807098 Deng Sep 1998 A
5814121 Travis Sep 1998 A
5838243 Gallo Nov 1998 A
5865618 Hiebert Feb 1999 A
5906197 French et al. May 1999 A
5915952 Manning et al. Jun 1999 A
5931661 Kingery Aug 1999 A
5941699 Abele Aug 1999 A
5944257 Dietiker et al. Aug 1999 A
5966937 Graves Oct 1999 A
5971746 Givens et al. Oct 1999 A
5975112 Ohmi et al. Nov 1999 A
5987889 Graves et al. Nov 1999 A
5988204 Reinhardt et al. Nov 1999 A
5988214 Tajima et al. Nov 1999 A
6000427 Hutton Dec 1999 A
6026849 Thordarson Feb 2000 A
6035893 Ohmi et al. Mar 2000 A
6045058 Dobbeling et al. Apr 2000 A
6050081 Jansen et al. Apr 2000 A
6076517 Kahlke et al. Jun 2000 A
6135063 Welden Oct 2000 A
6162048 Griffioen et al. Dec 2000 A
6244223 Welk Jun 2001 B1
6244524 Tackels et al. Jun 2001 B1
6247486 Schwegler et al. Jun 2001 B1
6257270 Ohmi et al. Jul 2001 B1
6340298 Vandrak et al. Jan 2002 B1
6347644 Channell Feb 2002 B1
6354072 Hura Mar 2002 B1
6354078 Karlsson et al. Mar 2002 B1
6402052 Murawa Jun 2002 B1
6431957 Lefky Aug 2002 B1
6543235 Crocker et al. Apr 2003 B1
6607854 Rehg et al. Aug 2003 B1
6634351 Arabaolaza Oct 2003 B2
6672326 Pappalardo et al. Jan 2004 B2
6705342 Santinanavat et al. Mar 2004 B2
6786194 Koegler et al. Sep 2004 B2
6832625 Ford Dec 2004 B2
6832628 Thordarson et al. Dec 2004 B2
6845966 Albizuri Jan 2005 B1
6884065 Vandrak et al. Apr 2005 B2
6901962 Kroupa Jun 2005 B2
6904873 Ashton Jun 2005 B1
6910496 Strom Jun 2005 B2
6938634 Dewey, Jr. Sep 2005 B2
6941962 Haddad Sep 2005 B2
7013886 Deng Mar 2006 B2
7044729 Ayastuy et al. May 2006 B2
7048538 Albizuri May 2006 B2
7143783 Emke et al. Dec 2006 B2
7146997 Francis et al. Dec 2006 B2
7156370 Albizuri Jan 2007 B2
7174913 Albizuri Feb 2007 B2
7201186 Ayastuy Apr 2007 B2
7225830 Kershaw Jun 2007 B1
7228872 Mills Jun 2007 B2
7251940 Graves et al. Aug 2007 B2
7299799 Albizuir Nov 2007 B2
7334772 Carepa Feb 2008 B2
7367352 Hagen et al. May 2008 B2
7386981 Zielinski et al. Jun 2008 B2
7434447 Deng Oct 2008 B2
7458386 Zhang Dec 2008 B2
7487888 Pierre, Jr. Feb 2009 B1
7490869 Iturralde et al. Feb 2009 B2
7523762 Buezies et al. Apr 2009 B2
7528608 Elexpuru et al. May 2009 B2
7533656 Dingle May 2009 B2
7559339 Golan et al. Jul 2009 B2
7591257 Bayer et al. Sep 2009 B2
7600529 Querejeta Oct 2009 B2
7607325 Elexpuru et al. Oct 2009 B2
7607426 Deng Oct 2009 B2
7617841 Zimpfer et al. Nov 2009 B2
7634993 Bellomo Dec 2009 B2
7637476 Mugica et al. Dec 2009 B2
7641470 Albizuri Jan 2010 B2
7651330 Albizuri Jan 2010 B2
7654820 Deng Feb 2010 B2
7677236 Deng Mar 2010 B2
7730765 Deng Jun 2010 B2
7758323 Orue Jul 2010 B2
7766006 Manning et al. Aug 2010 B1
7861706 Bellomo Jan 2011 B2
7942164 Hsiao May 2011 B2
7967006 Deng Jun 2011 B2
7967007 Deng Jun 2011 B2
8011920 Deng Sep 2011 B2
8057219 Manning et al. Nov 2011 B1
8123150 Khan et al. Feb 2012 B2
8152515 Deng Apr 2012 B2
8162002 Pavin et al. Apr 2012 B2
8235708 Deng Aug 2012 B2
8241034 Deng Aug 2012 B2
8281781 Deng Oct 2012 B2
8297968 Deng Oct 2012 B2
8464754 Stretch et al. Jun 2013 B2
8479759 Benvenuto et al. Jul 2013 B2
8517718 Deng Aug 2013 B2
8622069 Ferreira Jan 2014 B2
8757139 Deng Jun 2014 B2
9170016 Deng Oct 2015 B2
9523497 Deng Dec 2016 B2
20020058266 Clough et al. May 2002 A1
20020155011 Hartnagel et al. Oct 2002 A1
20020160325 Deng Oct 2002 A1
20020160326 Deng Oct 2002 A1
20030010952 Morete Jan 2003 A1
20030150496 Rousselin Aug 2003 A1
20030213523 Neff Nov 2003 A1
20030217555 Gerhold Nov 2003 A1
20040011411 Thordarson et al. Jan 2004 A1
20040025949 Wygnaski Feb 2004 A1
20040040315 Koyama et al. Mar 2004 A1
20040226600 Starer et al. Nov 2004 A1
20040238029 Haddad Dec 2004 A1
20040238030 Dewey, Jr. Dec 2004 A1
20040238047 Kuraguchi et al. Dec 2004 A1
20050028781 Yamada Feb 2005 A1
20050036770 Ito et al. Feb 2005 A1
20050167530 Ward et al. Aug 2005 A1
20050202361 Albizuri Sep 2005 A1
20050208443 Bachinski et al. Sep 2005 A1
20060065315 Neff et al. Mar 2006 A1
20060096644 Goldfarb et al. May 2006 A1
20060154194 Panther et al. Jul 2006 A1
20060201496 Shingler Sep 2006 A1
20060236986 Fujisawa et al. Oct 2006 A1
20070044856 Bonior Mar 2007 A1
20070154856 Hallitt et al. Jul 2007 A1
20070210069 Albizuri Sep 2007 A1
20070215223 Morris Sep 2007 A1
20070215225 Koch et al. Sep 2007 A1
20070266765 Kitagawa Nov 2007 A1
20070277803 Deng Dec 2007 A1
20070277812 Deng Dec 2007 A1
20070277813 Deng Dec 2007 A1
20080041470 Golan et al. Feb 2008 A1
20080121116 Albizuri May 2008 A1
20080149872 Deng Jun 2008 A1
20080153044 Deng Jun 2008 A1
20080153045 Deng Jun 2008 A1
20080168980 Lyons et al. Jul 2008 A1
20080223465 Deng Sep 2008 A1
20080227045 Deng Sep 2008 A1
20080236688 Albizuri Oct 2008 A1
20080236689 Albizuri Oct 2008 A1
20080314090 Orue Orue et al. Dec 2008 A1
20090039072 Llona Feb 2009 A1
20090139304 Deng Jun 2009 A1
20090140193 Albizuri Jun 2009 A1
20090159068 Querejeta et al. Jun 2009 A1
20090280448 Antxia Uribetxebarria et al. Nov 2009 A1
20100035195 Querejeta Andueza et al. Feb 2010 A1
20100035196 Deng Feb 2010 A1
20100037884 Deng Feb 2010 A1
20100086884 Querejeta Andueza et al. Apr 2010 A1
20100086885 Querejeta Andueza et al. Apr 2010 A1
20100089385 Albizuri Apr 2010 A1
20100089386 Albizuri Apr 2010 A1
20100095945 Manning Apr 2010 A1
20100102257 Achor et al. Apr 2010 A1
20100132626 Torgerson et al. Jun 2010 A1
20100154777 Carvalho et al. Jun 2010 A1
20100163125 Igarashi Jul 2010 A1
20100170503 Deng Jul 2010 A1
20100255433 Querejeta Andueza et al. Oct 2010 A1
20100275953 Orue Orue et al. Nov 2010 A1
20100310997 Mugica Odriozola et al. Dec 2010 A1
20100319789 Erdmann et al. Dec 2010 A1
20100326430 Deng Dec 2010 A1
20100330513 Deng Dec 2010 A1
20100330518 Deng Dec 2010 A1
20100330519 Deng Dec 2010 A1
20110081620 Deng Apr 2011 A1
20110143294 Deng Jun 2011 A1
20110168284 Whitford et al. Jul 2011 A1
20110193000 Miyazoe et al. Aug 2011 A1
20110198841 Kitagawa Aug 2011 A1
20110226355 Benvenuto et al. Sep 2011 A1
20110284791 Vasquez et al. Nov 2011 A1
20120006091 Deng Jan 2012 A1
20120006426 Gorelic Jan 2012 A1
20120012009 Deng Jan 2012 A1
20120012097 Deng Jan 2012 A1
20120012099 Deng Jan 2012 A1
20120012103 Deng Jan 2012 A1
20120067341 Mateos Martin Mar 2012 A1
20120080024 Deng Apr 2012 A1
20120118238 Togerson et al. May 2012 A1
20120132189 Deng May 2012 A1
20120160186 Turrin Jun 2012 A1
20120187318 Chen Jul 2012 A1
20130098349 Deng Apr 2013 A1
20140186783 Deng Jul 2014 A1
Foreign Referenced Citations (99)
Number Date Country
2167287 Jun 1994 CN
2209297 Oct 1995 CN
2421550 Feb 2001 CN
2421550 Feb 2001 CN
2430629 May 2001 CN
2430629 May 2001 CN
1873268 Dec 2006 CN
1873268 Dec 2006 CN
1873268 Dec 2006 CN
2844777 Dec 2006 CN
200979025 Nov 2007 CN
201013968 Jan 2008 CN
201028619 Feb 2008 CN
101140033 Mar 2008 CN
201166154 Dec 2008 CN
101363549 Feb 2009 CN
201212569 Mar 2009 CN
201228788 Apr 2009 CN
201241969 May 2009 CN
101699109 Apr 2010 CN
101701635 May 2010 CN
101865312 Oct 2010 CN
201606540 Oct 2010 CN
101881481 Nov 2010 CN
201621334 Nov 2010 CN
201651456 Nov 2010 CN
101943476 Jan 2011 CN
201739559 Feb 2011 CN
201779762 Mar 2011 CN
201982726 Sep 2011 CN
102494164 Jun 2012 CN
102506198 Jun 2012 CN
202360799 Aug 2012 CN
102661409 Sep 2012 CN
202708189 Jan 2013 CN
202708209 Jan 2013 CN
202884149 Apr 2013 CN
202884174 Apr 2013 CN
202884327 Apr 2013 CN
202955313 May 2013 CN
202955780 May 2013 CN
113 680 Nov 1899 DE
113680 Nov 1899 DE
720 854 May 1942 DE
720854 May 1942 DE
1650303 Sep 1970 DE
1650303 Sep 1970 DE
1959677 May 1971 DE
1959677 May 1971 DE
3345561 Jul 1985 DE
3700233 Jul 1988 DE
19543018 May 1997 DE
19543018 May 1997 DE
0509626 Oct 1992 EP
0509626 Oct 1992 EP
1326050 Jul 2003 EP
1326050 Jul 2003 EP
1939526 Jul 2008 EP
1970625 Sep 2008 EP
2151367 Apr 1973 FR
19845 Feb 1913 GB
191219845 Feb 1913 GB
1136468 Dec 1968 GB
1136468 Dec 1968 GB
1381887 Jan 1975 GB
1424711 Feb 1976 GB
2210155 Jun 1989 GB
2241180 Aug 1991 GB
2241180 Aug 1991 GB
2298039 Aug 1996 GB
2298039 Aug 1996 GB
S5765469 Apr 1982 JP
58 219320 Dec 1983 JP
59 009425 Jan 1984 JP
59009425 Jan 1984 JP
03 230015 Oct 1991 JP
H11311150 Nov 1991 JP
05 256422 May 1993 JP
05-256422 May 1993 JP
H09329254 Dec 1997 JP
10 141656 May 1998 JP
10141656 May 1998 JP
11 192166 Jul 1999 JP
11192166 Jul 1999 JP
11-344216 Dec 1999 JP
11 344216 Dec 1999 JP
2000234738 Aug 2000 JP
2000234738 Aug 2000 JP
2003 056845 Feb 2003 JP
2003 074837 Mar 2003 JP
2003 074838 Mar 2003 JP
2003099131 Apr 2003 JP
2004360713 Dec 2004 JP
2010071477 Apr 2010 JP
02077545 Oct 2002 WO
2007109664 Sep 2007 WO
2008012849 Jan 2008 WO
2008071970 Jun 2008 WO
WO 2008071970 Jun 2008 WO
Non-Patent Literature Citations (53)
Entry
Consumer Guide to Vent-Free Gas Supplemental Heating Products, est. 2007.
Country Flame Technologies Inglenook Fireplace Gas Log Set Model INGLS 24-N Or INGLS 24-P Natural Gas or Propane Conversion Kit, Installation, Operation, and Maintenance Manual, 2004.
Desa Heating Products, Technical Service Training Manual, 2004.
Extended European Search Report in International Application No. PCT/US2013/048769, dated Apr. 22, 2016.
Flagro F-400T Dual Fuel Construction Heater, Operating Instructions Manual.
Gas Hearth Systems Reference Manual, Chapter 18: Millivolt Gas Control Valves, Jun. 2006.
Heat and Glo, Escape Series Gas Fireplaces, Mar. 2005.
Heat and Glo, Escape-42DV Owner's Manual, Rev. i, Dec. 2006.
Heat Wagon S1505 Construction Heater, Installation and Maintenance Manual, Jul. 29, 2002.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-20, Jun. 2002.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-20, Nov. 2003.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-20, Sep. 2003.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-20, Jun. 2005.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-20, Sep. 2004.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-32, Aug. 2002.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-33, Apr. 2001.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Model VFHS-36, Mar. 2001.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFHD-32 and VFHS-36, Apr. 2003.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFHD-32 and VFHS-36, Feb. 2004.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFHD-32 and VFHS-36, Jun. 2005.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFHD-32 and VFHS-36, Sep. 2003.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFHD-32 and VFHS-36, Sep. 2004.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFP32FP and VFP36FP, Mar. 2006.
Installation Instructions and Owner's Manuals for Empire Unvented Gas Fireplace Models VFP32FP and VFP36FP, May 2006.
International Search Report and Written Opinion for International Application No. PCT/US2013/056007, Notification dated Feb. 3, 2014.
International Search Report and Written Opinion for International Application No. PCT/US2011/039521, Notification dated Mar. 18, 2013.
International Search Report and Written Opinion for International Application No. PCT/US2011/039524, Notification dated Mar. 13, 2013.
International Search Report and Written Opinion for International Application No. PCT/US2011/039525, Notification dated Apr. 5, 2013
International Search Report and Written Opinion for International Application No. PCT/US2011/039526, Notification dated Mar. 28, 2013
International Search Report and Written Opinion for International Application No. PCT/US2012/021455, Notification dated Oct. 8, 2013.
International Search Report and Written Opinion for International Application No. PCT/US2012/034983, Notification dated Jul. 24, 2012
International Search Report and Written Opinion for International Application No. PCT/US2013/040202, Notification dated Sep. 6, 2013.
International Search Report and Written Opinion for International Application No. PCT/US2013/056024, Notification dated Jan. 9, 2014.
International Search Report and Written Opinion dated Nov. 5, 2013 in the related PCT Application No. PCT/US13/48769.
Invitation to Pay Additional Fees and, Where Applicable, Protest Fee for PCT Application No. PCT/US2012/032176 filed Apr. 4, 2012.
Jotul GF 3 BVAllagash B-Vent Gas Heater, Installation and Operating Instructions, Dec. 2000.
Napoleon, Park Avenue Installation and Operation Instructions, Jul. 20, 2006.
Napoleon, The Madison Installation and Operation Instructions, May 24, 2005.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): Claims Construction Memorandum Opinion and Order, Jul. 8, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's Initial Invalidity Contentions, Mar. 31, 2014.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): Procom Heating's First Amended Complaint, Aug. 13, 2014.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's Answer to the First Amended Complaint, Aug. 27, 2014.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Char—Exhibit A, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit B, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit C, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit D, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit E, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit F, Sep. 4, 2015.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit G, Sep. 4, 2015.
Vanguard Unvented (Vent-Free) Propane/LP Gas Log Heater Manual, Feb. 2004.
White Mountain Hearth, The Vail Vent-Free Gas Fireplace, Installation Instructions and Owner's Manual, Mar. 2006.
Procom Heating, Inc. v. GHP Group, Inc. (W.D. KY, Case No. 1:13-cv-00163-GNS-HBB): GHP's 2nd Amended Initial Invalidity Contentions, Claims Chart—Exhibit A, Sep. 4, 2015.
Related Publications (1)
Number Date Country
20160290631 A1 Oct 2016 US
Provisional Applications (5)
Number Date Country
62322746 Apr 2016 US
62216807 Sep 2015 US
61748044 Dec 2012 US
61748052 Dec 2012 US
61473714 Apr 2011 US
Continuation in Parts (3)
Number Date Country
Parent 13791667 Mar 2013 US
Child 15175799 US
Parent 13791652 Mar 2013 US
Child 13791667 US
Parent 13310664 Dec 2011 US
Child 13791652 US