Patent Application
20150151269
The invention deals with the processing of a fluid by an electric arc between two electrodes. The invention provides for an efficient flow of a fluid feedstock through the plasma formed by the arc.
Electric arcs have been used to process fluids as evidenced by, for example, U.S. Pat. No. 8,236,150 to Ruggero Maria Santilli, issued Aug. 7, 2012 and U.S. Pat. No. 7,780,924 to Ruggero Maria Santilli, issued Aug. 24, 2010. In such, it has been recognized that for some fluids, it is desired to expose a large percentage of the fluid to the electric arc for many reasons including efficient conversion to combustible gas and for disabling of certain microbes (as when the fluid is sewage).
In prior systems, the fluid was pumped directly through the electrodes that produced the arc, through a channel formed within one or both electrodes of the arc, as in the noted patents to Santilli. When processing certain fluids, notably carbon-based fluids such as petroleum-based oils, systems of the prior art often realized buildup of carbon on one of the electrodes, requiring periodic shutting down of the reactor to replace or clean the electrode. It is desired to operate the reactor for as long as possible before replacing or servicing the electrodes, which was addressed partially by prior disclosures having moving electrodes that allowed for tuning of the electrodes by moving one or both electrodes closer, farther, or to a different position with respect to the other electrode. As the electrode accumulates carbon or as the electrode erodes (e.g., gives up carbon) the voltage, fluid flow, and position of the electrodes are adjusted to maintain an optimal arc. Such mechanisms are useful in extending the non-stop operational time of these reactors, but these mechanisms have limited ability to reduce buildup of carbon on the electrodes, especially when processing carbon or petroleum based fluids such as used motor oil, crude oil, vegetable oil, used cooking oil, used motor oil, or any fluids with hydrocarbon structures. For example, when electrodes are submerged in such fluids and an arc is formed between the electrodes, carbon bi-products are separated from the fluids and deposited on one or both of the electrodes, causing substantial buildup of such byproducts on the electrodes.
In other systems, materials such as municipal waste, tires, sewage are gasified using plasma from other sources such as magnetic induction and high intensity flame. In these systems, the material is simply subjected to the plasma without a flow-thru mechanism.
What is needed is a system that will efficiently flow a material through a plasma as for example from an arc or other, exposing as much of the fluid as possible to the plasma, while reducing accumulation of carbon bi-products.
A flow-through electric arc system is disclosed including a chamber within an electrically insulated sleeve having an anode at one end of the insulated sleeve and a cathode at a distal end of the insulated sleeve. Fluid flows from an inlet, through the insulated sleeve where it is exposed to an electric arc formed between the anode and cathode, and then flows out of an outlet.
In another embodiment, a method of exposing a fluid to an electric arc is disclosed including flowing of the fluid through a chamber within an insulated sleeve while concurrently forming an electric arc within the insulated sleeve.
In another embodiment, a method of exposing a fluid to plasma for the production of a gas is disclosed. The method includes forming a plasma within a bore within a sleeve, the sleeve having an input end, a central area, and an output end. Fluid flows from the input end of the sleeve, through the bore within the sleeve, and out of the output end of the sleeve at a velocity, such that, bi-products that are released from the fluid by reaction of the fluid with the plasma are flushed out of the sleeve along with gases produced by the fluid being exposed to the plasma and any fluid that remains. At least some of the bi-products that are released from the fluid by the reaction are prevented from accumulating on the sleeve.
In another embodiment, a system for the production of a gas from a fluid is disclosed. The system includes a source of plasma and a sleeve having a bore. An input port fluidly is interfaced to a first end of the bore and an output port is fluidly interfaced to a second end of the bore and the plasma is formed within the bore. Fluid flows from the input port, through the bore of the sleeve, and out of the output port at a velocity, such that, bi-products that are released from the fluid by reaction of the fluid with the plasma are flushed out of the sleeve along with gases produced by the fluid being exposed to the plasma and any fluid that remains. At least some of the bi-products that are released from the fluid by the reaction are prevented from accumulating on the sleeve.
In another embodiment, a system for the production of a gas from a carbon-based fluid is disclosed. The system has an anode connected to a first polarity of power and a cathode connected to a second, opposing polarity of power. The cathode separated from the anode by a gap, whereby a voltage differential between the anode and the cathode forms an arc there between. A sleeve having a longitudinal bore surrounds at least the gap between the anode and the cathode. The sleeve is made of a material that is an insulator of electricity. A second source of plasma forms a plasma in the sleeve proximal to the gap. An input port is fluidly interfaced to a first end of the longitudinal bore and an output port is fluidly interfaced to a second end of the longitudinal bore. A pump flows the carbon-based fluid from the input port, through the longitudinal bore of the sleeve, and out of the output port at a velocity, such that, carbon bi-products that are released from the carbon-based fluid by reaction of the carbon-based fluid with the arc and plasma and the carbon-based bi-products are flushed out of the longitudinal bore along with gases produced by the fluid being exposed to the arc and along with any of the carbon-based fluid that remains. At least some of the carbon bi-products that are released from the carbon-based fluid by the reaction with the plasma from the arc and/or the plasma from the second source of plasma are prevented from accumulating on either of the anode, on the cathode, or on both the anode and cathode.
The invention can be best understood by those having ordinary skill in the art by reference to the following detailed description when considered in conjunction with the accompanying drawings in which:
Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Throughout the following detailed description, the same reference numerals refer to the same elements in all figures.
In general, one goal of the disclosed device is to enclose an arc within a restrictor 56/156/256 and flow a fluid through the restrictor at a velocity such that as carbon particles are released from the fluid by the arc, the carbon particles are swept away from the arc to limit buildup of these carbon bi-products on the electrodes creating the arc.
Throughout this description and claims, the term “insulator” refers primarily to a materials resistance to conduction of electricity, though it is fully anticipated that electrical insulators are sometime insulators to other forms of energy such as heat and light.
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In this example, the cathode shaft 21 and is connected to the cathode 27 and both are held and supported by an insulated cathode housing 30. An outlet port 34 in the cathode housing 30 provides for an exit for the fluid and any generated gases to exit from the vessel 9. The anode 67 is connected to an anode shaft 63 and both are held and supported by an insulated anode housing 60. An inlet port 64 in the anode housing 60 provides for an entry of the fluid into the vessel 9.
In this example, the cathode 27 and anode 67 are preferably enclosed within a vessel body 50, the vessel body 50 being preferably made of metal such as steel, stainless, nickel, and/or copper.
The cathode shaft 21 has a connection block 22 that is electrically connected to a source of power 5, which conducts through the cathode shaft 21 to the cathode 27. Likewise, the anode shaft 63 is connected to a source of power 7 of opposite polarity (e.g., by a fastener 65), which is conducted through the anode shaft 63 to the anode 67. The potential between the cathode 27 and the anode 67 cause an arc to form in the gap 58 between the cathode 27 and the anode 67 and within the vessel body 50.
For completeness, metal support rods 8 are shown. In this example, the metal support rods 8 physically support the motor 10, cathode housing 30 and anode housing 60, though there are many ways to physically support the motor 10, cathode housing 30 and anode housing 60, all of which are equally anticipated and included here within.
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The fluid enters the inlet port 64 at a certain pressure (e.g. by way of a pump that is not shown for brevity reasons), resulting in a flow velocity of the fluid at the entry to the sleeve 56, where the sleeve 56 has a cross-sectional area. As the fluid flows into the sleeve 56, the fluid flows into an area that has a smaller cross-sectional area, resulting in an increased flow velocity. A number of bi-products are released from the fluid as a result of the fluid being exposed to the arc. For example, if the fluid is carbon-based such as motor oil, cooking oil, etc., a number of bi-products are released. Prior, these bi-products (e.g., carbon atoms) would migrate to the electrodes 27/67 and collect on the electrodes 27/67, causing buildup of material (e.g., carbon) on one or both of the electrodes 27/67. The fluid, moving at the increased flow velocity past the arc created in the gap 58 between the electrodes 27/67 reduces the number of these bi-products (e.g., carbon atoms) that will have an opportunity to collect on the electrodes 27/67, and instead, these bi-products (e.g., carbon atoms) are swept away with the fluid and any gases that are produced by this reaction and exit the outlet port 34 of the cathode housing 30.
In some embodiments, during operation of the arc, the cathode 27 is moved towards or away from the electrode through operation of the motor 10. As the motor turns in one direction, the electrodes 27/67 move closer together and as the motor turns in an opposite direction, the electrodes 27/67 move farther apart. This is but one example of how location of the electrodes 27/67 are changed and the present invention is not limited in any way to any particular mechanism for adjusting the electrodes 27/67 and, hence, adjustment of the gap 58 between the electrodes 27/67, and consequently, the arc itself. Any system for controlling and tuning the gap 58 and therefore, the arc, is fully anticipated and included here within.
The cathode 27 is held in a preferably non-conductive cathode housing 30 and connected to power 5 through, for example, a connection block 22. The anode is held in a second, preferably non-conductive anode housing 60. Power 7 is connected to the anode 67 through the anode shaft 63, for example, at a connection point 65 on the anode shaft 63.
The arc is formed in the gap 58 between the electrodes 27/67. The electrodes 27/67 are confined within the inner bore of an insulated sleeve 56. With such, the source fluid is channeled through the restrictor sleeve 56 at a rate that reduces buildup of bi-products on the electrodes 27/67, as would happen if the electrodes 27/67 were simply immersed within the fluid. A faster the flow of the fluid through the restrictor sleeve 56, generally results in less buildup on the electrodes 27/67. The restrictor sleeve 56 is preferably made of a nonconductive material such as ceramic, granite, refractory, phenolic, alumina, and zirconia. The vessel body 50 that surrounds the restrictor sleeve is preferably made of a strong, metallic material such as steel, stainless steel, iron, nickel, etc. The vessel body 50 helps contain pressure that is present within the chamber restrictor sleeve 56.
The restrictor sleeve 56 is, for example, generally tubular. In this example, the restrictor sleeve 56 is double tapered to form a venturi (as shown). In this, the overall cross-sectional area of the restrictor sleeve 56 is greater at both ends (input end and exit end) than the overall cross-sectional area of the middle area of the restrictor sleeve 56 (in the area of the gap 58). This restriction in the area of the gap 58 causes the fluid to flow at a greater rate at the area of restriction as per the venturi principles. Note that to avoid undue fluid flow restriction, in some embodiments the restrictor sleeve 56 has an entry cone (angle of constriction near the anode 67) of approximately 30 degrees and an exit cone (angle of divergence near the cathode 27) of approximately 5 degrees.
In operation, a fluid is pumped into the anode housing 60 of the vessel 9 through the inlet port 64, through the restrictor sleeve 56 for exposure to the arc formed within the gap 58 where exposure to the arc generates gases. Remaining fluid and gases flow out of the cathode housing 30 through the outlet port 34. Upon exiting the outlet port 34, the gases are separated from the fluid and collected; then, in some embodiments, the fluid is circulated/pumped back into the inlet port 64. In some such embodiments, the cited carbon bi-products (e.g., carbon atoms) are removed from the fluid (e.g. by electrostatic attraction or by filtering) before the fluid is circulated/pumped back into the inlet port 64.
Again, as the fluid enters at a specific flow rate, the flow rate increases as the cross-sectional area of the restrictor sleeve 56 reduces, thereby flowing at an even greater rate in the area of the gap 58. This higher rate of flow reduces potential for carbon bi-products (or molecules) that are freed from the fluid to migrate to the electrodes 27/67 and collect on the surface of the electrodes 27/67. Therefore, there is less buildup of bi-products on the electrodes 27/67 and within the vessel 9, resulting in longer operating periods of time before one or both of the electrodes 27/67 require cleaning and/or replacement.
The arc within the gap 58 is energized by applying appropriate power to the cathode 27 and anode 67 through the cathode shaft 21 (no 23 in pictures) and the anode shaft 63. Since the cathode shaft 21 moves in a linear direction, in the embodiments shown, a cathode power connection block 22 is electrically and physically attached to the cathode shaft 21 for connection to power. It is anticipated that a flexible/bendable power cable 5 connects power to the cathode power connection block 22 so as to allow for movement of the cathode shaft 21.
Fluid flows, preferably under pressure, into the anode housing 60 through an inlet port 64. The fluid flows in a space between the bore within the insulated sleeve 56 and the electrodes 27/67. When the fluid passes the gap 58, the fluid is exposed to the arc 58 for treatment and generation of gas. Finally, the fluid and generated gases flow through the cathode housing 20 and out of an outlet port 34. Note that flow in either direction is anticipated.
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The fluid enters the inlet port 64 at a certain pressure (e.g. by way of a pump that is not shown for brevity reasons), resulting in a flow velocity of the fluid at the entry to the sleeve 156, where the sleeve 156 has a larger cross-sectional area. As the fluid flows into the sleeve 156, the fluid flows into an area that has a smaller cross-sectional area, resulting in an increased flow velocity. A number of carbon bi-products are released from the fluid as a result of the fluid being exposed to the arc. For example, if the fluid is carbon-based such as motor oil, cooking oil, etc., a number of carbon bi-products are released. Prior, these bi-products (e.g., carbon atoms) would migrate to the electrodes 27/67 and collect on the electrodes 27/67, causing buildup of material (e.g., carbon) on the electrodes 27/67. The fluid, moving at the increased flow velocity past the arc created in the gap 58 between the electrodes 27/67 reduces the number of these bi-products (e.g., carbon atoms) that will have an opportunity to collect on the electrodes 27/67, and instead, these bi-products (e.g., carbon atoms) are swept away with the fluid and any gases that are produced by this reaction and exit the outlet port 34 of the cathode housing 30.
The arc is formed in the gap 58 between the electrodes 27/67. The electrodes 27/67 are confined within the inner bore of an insulated sleeve 156. With such, the fluid is channeled through the restrictor sleeve 156 at a rate that reduces buildup of bi-products on the electrodes 27/67, as would happen if the electrodes 27/67 were simply immersed within the fluid. A faster flow of the fluid through the restrictor sleeve 156, generally results in less buildup on the electrodes 27/67. The restrictor sleeve 156 is preferably made of a non-conductive material such as ceramic and the vessel body 50 that surrounds the restrictor sleeve is preferably made of a strong, metallic material such as steel. The vessel body 50 helps contain pressure that is present within the chamber restrictor sleeve 156.
The restrictor sleeve 156 is, for example, generally tubular. In the tapered restrictor sleeve 156 a single taper reduces the overall cross-sectional area of the restrictor sleeve 156 from a greater cross-sectional area at an input end to a smaller overall cross-sectional area along the remainder of the restrictor sleeve 156, including the area surrounding the gap 58. This restriction in the area of the gap 58 causes the fluid to flow at a greater velocity at the area of restriction. Note that to avoid undue fluid flow restriction, in some embodiments the restrictor sleeve 156 has an entry cone (angle of constriction near the anode 67) of approximately 30 degrees.
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The fluid enters the inlet port 64 at a certain pressure (e.g. by way of a pump that is not shown for brevity reasons), resulting in a specific flow velocity of the fluid through the sleeve 256. In this embodiment, the sleeve 256 has a substantially constant cross-sectional area, resulting in a flow velocity that is dependent upon the pressure supplied at the inlet port 64. A number of bi-products are released from the fluid as a result of the fluid being exposed to the arc. For example, if the fluid is carbon-based such as motor oil, cooking oil, etc., a number of carbon bi-products are released. Prior, these bi-products (e.g., carbon atoms) would migrate and collect on one or both of the electrodes 27/67, causing a buildup of material (e.g., carbon) on the electrodes 27/67. The fluid, moving at the resulting velocity past the arc created in the gap 58 between the electrodes 27/67 reduces the number of these bi-products (e.g., carbon atoms) that will have an opportunity to collect on the electrodes 27/67, and instead, these bi-products (e.g., carbon atoms) are swept away with the fluid and any gases that are produced by this reaction and exit the outlet port 34 of the cathode housing 30.
The arc is formed in the gap 58 between the electrodes 27/67. The electrodes 27/67 are confined within the inner bore of an insulated sleeve 256. With such, the fluid is channeled through the linear restrictor sleeve 256 at a rate that reduces buildup of bi-products on the electrodes 27/67, as would happen if the electrodes 27/67 were simply immersed within the fluid. A faster velocity of the fluid through the restrictor sleeve 256, generally results in less buildup on the electrodes 27/67. The restrictor sleeve 256 is preferably made of a nonconductive material such as ceramic and the vessel body 50 that surrounds the restrictor sleeve is preferably made of a strong, metallic material such as steel. The vessel body 50 helps contain pressure that is present within the chamber restrictor sleeve 256.
The restrictor sleeve 256 is, for example, generally tubular with a substantially constant overall cross-sectional area, including the area surrounding the gap 58. Therefore, the velocity of the fluid is not increased substantially by the restrictor sleeve 256 and is dependent upon the pressure of the fluid as provided at the inlet port 64.
In operation, a fluid is pumped into the anode housing 60 of the vessel 9 through the inlet port 64, through the restrictor sleeve 256 for exposure to the arc formed within the gap 58 where exposure to the arc generates gases, and remaining fluid and gases flow out of the cathode housing 30 through the outlet port 34. Upon exiting the outlet port 34, the gases are separated from the fluid and collected; then, in some embodiments, the fluid is circulated/pumped back into the inlet port 64. In some such embodiments, the cited bi-products (e.g., carbon atoms) are removed from the fluid (e.g. by electrostatic attraction or by filtering) before the fluid is circulated/pumped back into the inlet port 64
Again, the fluid enters at a specific flow rate or velocity and, therefore, the flow within the restrictor sleeve 256 in the area of the gap 58 is dependent upon the flow rate. This higher rate of flow reduces potential for bi-products (or molecules) that are freed from the fluid to migrate to the electrodes 27/67 and collect on the surface of the electrodes 27/67. Therefore, there is less buildup of, for example, carbon bi-products on the electrodes 27/67 and the vessel 9, for example, is capable of operating for longer periods of time before one or both of the electrodes 27/67 require cleaning and/or replacement.
The arc within the gap 58 is energized by applying appropriate power to the cathode 27 and anode 67 through the cathode shaft 21 and the anode shaft 63. Since the cathode shaft 21 moves in a linear direction, in the embodiments shown, a cathode power connection block 22 is electrically and physically attached to the cathode shaft 21 for connection to power. It is anticipated that a flexible/bendable power cable 5 connects power to the cathode power connection block 22 so as to allow for movement of the cathode shaft 21.
Fluid flows, preferably under pressure, into the anode housing 60 through an inlet port 64. The fluid flows through the space between the insulated sleeve 256 and the electrodes 27/67 where the fluid is exposed to the arc 58 for treatment and generation of a gas. Finally, the fluid and any generated gases flow through the cathode housing 30 and out of an outlet port 34. Note that flow in either direction is anticipated.
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In one exemplary use, used cooking oil is pumped into the inlet port 64. As the used cooking oil flows through the restrictor sleeve 56/156, the velocity of the cooking oil increases as the used cooking oil is exposed to the arc formed in the gap 58. Upon exposure to the arc, at least some of the used cooking oil is separated by electrolysis into a gas (e.g. hydrogen) with some number of free bi-products such as carbon remaining. These free bi-products (e.g., carbon) are swept away by the fluid (used cooking oil) and some such bi-products (e.g., carbon) are prevented from accumulating on the electrodes 27/67. Because of the heat and ignition source provided by the arc, there is some tendency for the produced gas to ignite. Because of the velocity of the used cooking oil through the restrictor sleeve 56/156, such ignition is at least partially suppressed. This results in a more efficient capture of a clean-burning gas from the used cooking oil.
Likewise, in this exemplary use in the apparatus 9 having a linear restrictor 256, used cooking oil is pumped at a higher pressure into the inlet port 64. As the used cooking oil flows through the restrictor sleeve 256, the velocity of the cooking oil is already high due to the higher pressure. As the used cooking oil is exposed to the arc formed in the gap 58, at least some of the used cooking oil is separated by electrolysis into a gas (e.g. hydrogen) with some number of free bi-products such as carbon remaining. These free bi-products (e.g., carbon) are swept away by the fluid (used cooking oil) and some such bi-products (e.g., carbon) are prevented from accumulating on the electrodes 27. Because of the heat and ignition source provided by the arc, there is some tendency for the produced gas to ignite. Because of the velocity of the used cooking oil through the restrictor sleeve 256, such ignition is at least partially suppressed. This results in a more efficient capture of a clean-burning gas from the used cooking oil.
The restrictor 56/156/256 is, preferably but not required, to be designed commensurate with the fluid (feedstock type) and/or application (e.g., sterilization or gasification). For the gas production application with the fluid being, for example, used cooking oil, the restrictor 56 (venturi type) tapers 57 to the narrowest cross-sectional area just before the gap 58, and therefore, has maximum flow at the gap 58. In this application, the reverse taper 59 of the restrictor 56 is just past the electrode gap 58.
For sterilization applications with, for example, water and suspended waste products as the feedstock, either restrictor 56/156/256 is anticipated.
The restrictor 56/156/256 is preferably made of a material that has a high electrical resistance (e.g., the material is a good insulator), has a high tolerance to thermal shock, and has a high operating temperature. The high operating temperature is required due to the high temperatures generated by the plasma arc, for example temperatures that range between 10,000 degrees and 12,000 degrees Fahrenheit). Although many materials are suitable for construction of the restrictor 56/156/256, granite, ceramics (alumina and zirconia), refractory materials (e.g., refractory cement), and porcelain are fully anticipated.
In some embodiments, DC power is provided to the cathode 27 and the anode 67 to form the electric arc. In some embodiments, the DC power to the cathode 27 and the anode 67 is periodically reversed to further reduce buildup of materials on either the cathode 27 or the anode 67. In some embodiments pulsed DC power is provided to the cathode 27 and the anode 67. In some embodiments AC power is provided to the cathode 27 and the anode 67. In some embodiments, both DC power and AC power is provided to the cathode 27 and the anode 67.
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In all exemplary of venturi style restrictor 56 examples, material is shown entering the bottom of the venturi style restrictor 56 and exiting the top, though a reversed direction is also anticipated. Although the venturi style restrictors 56 are shown in typical venturi-shape, any shape that accelerates the flow of the material through the plasma 310/410/510/610/710 is anticipated, such as the shapes described above. In general, the venturi style restrictor 56 increases the flow rate of the material through the plasma 310/410/510/610/710. As the material is exposed to the plasma 310/410/510/610/710, byproducts are released that, under lower-flow conditions, will attract and adhere to various surfaces, causing clogs and inefficiencies. By increasing the flow rate of the material in the area of the plasma 310/410/510/610/710, buildup is reduced.
As above, the restrictor 56 (e.g. venturi-shaped restrictor 56) is preferably made of a sturdy material that is capable of withstanding temperatures present surrounding the plasma 310/410/510/610/710. One exemplary material is ceramic. In some embodiments, the restrictor 56 is encapsulated in an outer sleeve 50, for example a steel sleeve 50.
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Referring to FIGS.
In all exemplary of venturi style restrictor 56 with secondary arc-generated plasma examples, material is shown entering the bottom of the venturi style restrictor 56 and exiting the top, though a reversed direction is also anticipated. Although the venturi style restrictors 56 are shown in typical venturi-shape, any shape that accelerates the flow of the material through the plasma 310/410/510/610/710 is anticipated, such as the shapes described above. In general, the venturi style restrictor 56 increases the flow rate of the material through the plasma 310/410/510/610/710. As the material is exposed to the plasma 310/410/510/610/710 from the noted plasma generators and the arc between the electrodes 27/67, byproducts are released that, under lower-flow conditions, will attract and adhere to various surfaces, causing clogs and inefficiencies. By increasing the flow rate of the material in the area of the plasma 310/410/510/610/710, buildup is reduced.
As above, the restrictor 56 (e.g. venturi-shaped restrictor 56) is preferably made of a sturdy material that is capable of withstanding temperatures present surrounding the plasma 310/410/510/610/710. One exemplary material is ceramic. In some embodiments, the restrictor 56 is encapsulated in an outer sleeve 50, for example a steel sleeve 50.
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In some embodiments, DC power is provided to the electrodes 27/67 to form the electric arc. In some embodiments, the DC power to the electrodes 27/67 is periodically reversed to further reduce buildup of materials on either the electrodes 27/67. In some embodiments pulsed DC power is provided to the electrodes 27/67. In some embodiments AC power is provided to the electrodes 27/67. In some embodiments, both DC power and AC power is provided to the electrodes 27/67.
Equivalent elements can be substituted for the ones set forth above such that they perform in substantially the same manner in substantially the same way for achieving substantially the same result.
It is believed that the system and method as described and many of its attendant advantages will be understood by the foregoing description. It is also believed that it will be apparent that various changes may be made in the form, construction and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages. The form herein before described being merely exemplary and explanatory embodiment thereof. It is the intention of the following claims to encompass and include such changes.
This application is a continuation-in-part of U.S. patent application Ser. No. 14/529,723 filed Oct. 31, 2014, which is a non-provisional application taking priority from U.S. patent application Ser. No. 61/898,839, filed Nov. 1, 2013, the disclosure of which is hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61898839 | Nov 2013 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14529723 | Oct 2014 | US |
| Child | 14582513 | US |
