The present invention relates to an improved food smoker in general, and in particular, an improved efficiency food smoker comprising a self-basting feature, and a ceramic chip bowl.
Food smokers are used for smoking food in a single unit. A flavoring source, such as charcoal briquettes with flavoring wood chips, wood chips and/or wood chunks are burned at the bottom of the food smoker to smoke food on racks supported above the flavoring source.
Current food smokers typically utilize metal materials, typically either cast iron, or porcelain coated steel, for holding the flavoring source that creates the smoke and adds flavor to the food in the smoker. Current food smoker designs require that the user open the food compartment during the cooking process in order to baste the food to add flavor and avoid the food becoming too dry. Current food smoker designs also require that the user open the smoker during the smoking process in order to add additional flavoring source.
Embodiments of the present invention are directed toward a food smoker with self-basting features and relatively low thermal conductivity chip bowls. A lid of the food smoker may include downward pointing protrusions to control dripping onto food being smoked. This self-basting feature reduces the need to open the food smoker to baste the food smoking therein. The food smoker may include a ceramic chip bowl to reduce the rate of consumption of wood chips or other flavoring sources used to produce smoke to add flavoring to the food being smoked. The ceramic chip bowl may also result in more even heating of the chips placed therein as compared to typical metal chip bowls. Thus, the ceramic chip bowl may further reduce the need to open the food smoker. In combination, these features result in an improved food smoker that requires less user interaction than traditional systems. Moreover, the reduced interaction results in the food smoker needing to be opened fewer times during the smoking process, which decreases total smoking time and reduces heat loss associated with opening the food smoker and thus leads to greater energy efficiency.
In one aspect, a food smoker includes a housing comprising a base and a lid, a heat source, a ceramic chip bowl, and a first food rack. The housing may be vertically oriented. The lid is positioned on a top of the base. The heat source is disposed within the housing, and the ceramic chip bowl is disposed between the heat source and the lid. The ceramic chip bowl is disposed above the heat source and below the lid. The first food rack includes a cooking surface and is positioned between the ceramic chip bowl and the lid. The lid includes a perimeter and a region within the perimeter. The lid further includes a plurality of downward pointing protrusions positioned within the region within the perimeter and over the cooking surface. Each protrusion of the plurality of downward pointing protrusions is configured to provide a location for the concentration of condensate.
In an embodiment, the housing may be a double-wall thermally insulating housing. The lid may also be a double-wall thermally insulating lid. The double-wall construction, including the housing and/or lid, may limit undesired heat loss, allowing for the inside chamber to maintain a more even temperature, thereby reducing the amount of adjustment to the heat source required throughout the cooking process. The double-wall construction therefore may reduce the amount of adjustment to the heat source needed to maintain consistent temperature. The double-wall thermally insulating housing and/or the double-wall thermally insulating lid, may each include two walls, an inner and outer wall, with a gap between the two. This gap may be a void (e.g., filled with air) or the gap may be filled with any other appropriate insulating material. Additionally, regarding the two walls of the lid, the inner wall may contain the protrusions for self-basting and may be removable form the outer wall of the lid.
In an embodiment, each protrusion of the plurality of downward pointing protrusions may be formed integrally with the lid. The region within the perimeter of the lid may be substantially planar except for the plurality of downward pointing protrusions, and the plurality of downward pointing protrusions may be formed by deforming the lid in a downward direction from the region within the perimeter of the lid. The plurality of downward pointing protrusions may be arranged in successive diameter rings about a center of the lid.
In an embodiment, the food smoker may further include a water bowl disposed between the ceramic chip bowl and the first food rack. The food smoker may further include a diffuser disposed between the ceramic chip bowl and the water bowl, and a second food rack disposed between the first food rack and the lid.
The heat source for the food smoker may be a propane or natural gas burner.
In an arrangement, the lid may include a first portion and a second portion. The first portion may be generally planar, and the second portion may include the plurality of downward pointing protrusions. The first and second portions may be fastened to each other. In a variation, the first and second portions may be removably and replaceably fastened to each other, such that a user may choose whether or not to attach the second portion to the first portion when smoking food within the food smoker. In a variation, when fastened to each other, the first and second portions may have an insulating gap therebetween. The gap could be a void (e.g., filled with air) or the gap may be filled with any other appropriate insulating material. As discussed above, such a gap may limit undesired heat loss, allowing for the inside chamber to maintain a more even temperature, thereby reducing the amount of adjustment to the heat source required throughout the cooking process. In another variation, the first portion may be a double-wall thermally insulating portion as previously described, and the second portion may be removably and replaceably fastened to the first portion to allow the user to choose whether or not to have the protrusions present when smoking food within the food smoker.
In an embodiment, the ceramic chip bowl may include a bottom wall and a side wall forming an interior portion. The interior portion may be uncovered by any portion of the ceramic chip bowl. The walls of the ceramic chip bowl may be about 12 mm thick. The composition of the ceramic chip bowl may include silicon dioxide and aluminum oxide. In a variation, the composition of the ceramic chip bowl may include between 1.25 and 1.75 times more silicon dioxide than aluminum oxide. For example, the ceramic chip bowl may include between 50 and 60 percent silicon dioxide, and between 34 and 42 percent aluminum oxide.
In another aspect, a method of smoking food includes inserting wood chips into a ceramic chip bowl and positioning the ceramic chip bowl in a housing of a food smoker. The method also includes positioning food on a food rack within the housing above the ceramic chip bowl and placing a lid on top of the housing. Heat is produced within the housing, and this causes the wood chips to produce smoke. The method further includes condensing liquid on an underside of the lid of the smoker, and collecting the condensate at a lowermost portion of each protrusion of the plurality of protrusions. The collected condensate then drips from the plurality of protrusions onto the food. The method may further include, in any appropriate order, placing water in a water bowl and placing the water bowl within the housing. The method may further include burning propane to produce the heat.
Additional aspects and advantages of the present invention will become apparent to one skilled in the art upon consideration of the further description that follows. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention. Furthermore, any of the above arrangements, features and/or embodiments may be combined with any of the above aspects where appropriate.
For a more complete understanding of the present invention and further advantages thereof, the following Detailed Description of the Invention is provided along with the following drawings.
In the following description, embodiments of the present invention are set forth in the context of food smokers with self-basting features and relatively low thermal conductivity chip bowls. In particular, a lid of the food smoker may include downward pointing protrusions to control dripping onto food being smoked. This self-basting feature reduces the need to open the smoker to baste the food being smoked therein. Additionally, the food smoker may include a ceramic chip bowl to reduce the rate of consumption of wood chips used to add flavoring to the food being smoked. This further reduces the need to open the food smoker. The housing of the smoker, including walls and lid, may be constructed with an inner and an outer wall. Such double-wall construction may minimize the heat loss during the cooking process. In combination, these features result in an improved food smoker that requires less user interaction than traditional systems. Moreover, the reduced interaction results in the food smoker needing to be opened fewer times during the smoking process, which reduces heat loss associated with opening the food smoker and thus leads to greater energy efficiency.
The casters 15 may be fastened to the underside of the base 9. The base 9 may, for example, be made form steel. The base 9 may have a through-hole to allow any liquids within the housing 43 to be drained therethrough. The through hole may be plugged with a plug 21 when the housing 43 is not being drained. The plug 21 may be made from silicone or any other appropriate material capable of withstanding the temperatures generated during smoking.
A heat source 12 may be disposed at the bottom of the inside of the housing 43. As illustrated, the heat source 12 may be a propane burner. The heat source 12 may be adjustable to control the temperature within the housing 43 during smoking. The adjustment may be performed via a user control such as knob 8 (
A frame 7 may provide a support for a drawer 29 such that the drawer is positioned over the heat source 12. The frame 7 may allow for the drawer 29 to slide from a position within the housing 43 and over the heat source 12 to a position at least partially outside of the housing 43. The drawer 29 may support a ceramic chip bowl 3. The ceramic chip bowl 3 may hold a flavoring source such as, for example, wood chips, wood chunks, wood sticks, and/or charcoal briquettes with flavoring sources embedded therein. The ceramic chip bowl 3 and drawer 29 may each be configured to mate with each other such that when the ceramic chip bowl 3 or drawer 29 is pulled the other of the ceramic chip bowl 3 or drawer 29 moves also. For example, the drawer 29 may include a rectangular protrusion 24 that may interface with a corresponding feature on the bottom of the ceramic chip bowl 3.
The drawer 29 may be accessible through the side wall 2 via a door 31. In a variation, the door 31 may be of double-wall construction similar to as described above for the side wall 2. In this regard, a user may open the door 31, pull on the drawer 29, which also correspondingly moves the ceramic chip bowl 3, to gain access to the ceramic chip bowl 3 to, for example, replenish the ceramic chip bowl 3 with additional flavoring source (e.g., wood chips). The door 31 may be attached to the side wall 2 via hinges 27 (
The ceramic chip bowl 3 may be configured to hold the flavoring source over the heat source 12 during smoking. In this regard, the ceramic chip bowl 3 may include a bottom wall 39 and a side wall 40. The ceramic chip bowl 3 may be open to the top to allow smoke generated by the heating of the flavoring source therein to rise toward the food being smoked. The ceramic chip bowl 3 may comprise any appropriate ceramic material. For example, the ceramic chip bowl 3 may include silicon dioxide and aluminum oxide. The composition of the ceramic chip bowl 3 may include between 1.25 and 1.75 times more silicon dioxide than aluminum oxide. For example, the ceramic chip bowl 3 may contain between 50 and 60 percent silicon dioxide and 34 and 42 percent aluminum oxide. In an exemplary embodiment, the ceramic chip bowl 3 may be composed of about 55 percent silicon dioxide and 38 percent aluminum oxide. In another example, the ceramic chip bowl 3 may be terra cotta. The ceramic chip bowl 3 may be glazed or unglazed.
As compared to metal chip bowls present in prior art smokers, the ceramic chip bowl 3 may retard the heating of the flavoring source therein and heat the flavoring source more evenly. For example, the ceramic chip bowl 3 may result in the flavoring source burning at a rate from 25 to 50 percent slower than a metal chip bowl. Such reduction has multiple advantages. The slower burn rate results in less flavoring source consumption. The slower burn rate also reduces the frequency at which the flavoring source must be replenished. This results in less labor expended during the smoking process and less fuel used to heat the housing 43, since each time the door 31 is opened heat escapes which must be regenerated to maintain a desired temperature within the housing 43.
The side wall 2 may include openings 10 to allow air into the interior of the housing 43 in the vicinity of the heat source 12. An air shield 26 may be positionable over the openings 10 to restrict the flow of air through the openings 10. The air shield 26 may slide in a set of air shield rails 5 between a position where the air shield 26 restricts the flow of air through the openings 10 and a position where the air shield 26 does not restrict the flow of air through the openings 10.
The side wall 2 may also include an opening 37 through which may be inserted a temperature measurement device (not shown) or through which wires that are connected to a temperature measurement device may be routed. A cover 34 may be movable from a position covering the opening 37 to a position where a temperature probe may be inserted through the opening 37. The opening 37 may be situated at an elevation corresponding to where food being smoked within the housing 43 is positioned, thus a temperature measured through the opening 37 may coincide with the temperature at which the food is exposed.
The food smoker 1 may include handles 32 interconnected to the side wall 2 and capable of being used to lift the food smoker 1. The handles 32 may be insulated such that a user may be able to grasp the handles 32 despite the housing 43 being at an elevated temperature. For example, the handles 32 may be made from stainless steel coated with an insulating layer of a thermoplastic elastomer.
Within the housing 43, a diffuser plate 25 may be positioned above the ceramic chip bowl 3. The diffuser plate 25 may generally provide a barrier between the portion of the housing 43 where heat and smoke are generated and the portion of the housing 43 where the food being smoked resides. In this regard, the diffuser plate 25 may prevent direct exposure of the food being smoked to infrared heat generated by the heat source 12. The diffuser plate 25 may include a plurality of holes disposed toward the outside edges of the diffuser plate 25 to allow smoke from the flavoring source in the ceramic chip bowl 3 to rise up toward the food being smoked. The diffuser plate 25 may be held in place by support tabs 17 interconnected to the inside surface of the side wall 2.
A water bowl 28 may be positioned within the housing 43 and atop the diffuser plate 25. The water bowl 28 may provide a location for water to be held within the housing 43. Heat rising from the heat source 12 may heat the diffuser plate 25 and in turn heat the water bowl 28 causing water within the water bowl 28 to turn to water vapor. Such water vapor may maintain moisture within the food being smoked. Such water vapor may also condense on the underside of the lid 19 and subsequently drip onto the food being smoked as described below.
A first food rack 18a may be positioned above the water bowl 28 and supported along the periphery of the first food rack 18a in a first position by appropriately positioned additional support tabs 17 attached to the side wall 2. At least a portion of the food being smoked may be positioned on the first food rack 18a. A second food rack 18b may be positioned above the first food rack 18a and supported along the periphery of the second food rack 18b in a second position (above the first position) by appropriately positioned additional support tabs 17 attached to the side wall 2. At least a portion of the food being smoked may be positioned on the second food rack 18b. The first food rack 18a and second food rack 18b may be identically configured. The first food rack 18a may include recesses 42 along the periphery of the first food rack 18a operable to be aligned with support tabs 17 at the second position such that the first food rack 18a may be lifted past the support tabs 17 at the second position. For example, to remove the first food rack 18a from the housing 43, a user may first lift the first food rack 18a off of the support tabs 17 at the first position, as the first food rack 18a approaches the second position, the user may rotate the first food rack 18a such that the recesses 42 are aligned with the support tabs 17 at the second position. The user may next further lift the first food rack 18a such that the recesses 42 pass over the support tabs 17 at the second position. The user may then lift the first food rack 18a to remove the first food rack 18a from the housing 43. The first food rack 18a may be installed in the first position by reversing the removal process. Both the first food rack 18a and second food rack 18b may be in the form of wire racks comprising intersecting wires welded together to form cooking surfaces.
A pair of tools may be used to separately lift each of the first and second food racks 18a, 18b from the food smoker 1. Each of the tools may include a handle attached to an elongated member. At an end of the elongated member opposite the handle, the tool may include a member to interface with one of the first and second food racks 18a, 18b. For example, the member may be T-shaped such that it may be inserted between wires of the food rack and then turned 90 degrees such that when the tool is lifted, the member will engage the wires such that the food rack is also lifted. Other appropriate tools, such as tools that grasp one or more wires of the food rack may also be used.
The lid 19 may be removably and replaceably positioned at the top of the housing 43. The shape of the lid 19 may match the cross section of the side wall 2. For example, as illustrated, the side wall 2 may form a vertically oriented cylinder and the lid 19 may be round and of a corresponding diameter. In an alternative arrangement, the side wall 2 could form any appropriate cross section. For example, the side wall 2 could form a rectangular or square cross section, and the lid 19 may be in the shape of a corresponding rectangle or square, respectively.
A lid handle 11 may be interconnected to the lid 19 and may allow a user grasping the lid handle 11 to remove the lid from the housing 43 or replace the lid 19 onto the housing 43. The lid 19 may further include a vent 44 which may comprise one or more through holes in the lid 19. A vent cover 20 may allow the vent to be fully covered, partially covered, or fully uncovered. As illustrated in
A temperature indicating device 6 may be interconnected to the lid 19. The temperature indicating device 6 may be in the form of a thermometer with a sensing portion positioned below the underside of the lid 19 and an indicator portion positioned above the top surface of the lid 19. In this regard, a user may be able to read the indicator portion of the temperature indicating device 6 while the lid 19 is installed on the housing 43 and determine the temperature within the housing 43 at the sensing portion of the temperature indicating device 6.
The lid 19 may include a plurality of downward pointing protrusions 47. Such downward pointing protrusions 47 are illustrated in
The downward pointing protrusions 47 may be in the form of dimples or cones formed in the lid 19. The downward pointing protrusions 47 may be of any other appropriate form capable of concentrating condensate from a first area to a smaller second area from which the condensate may drip. For example, the downward pointing protrusions 47 may be pyramid shaped.
The lid 19 may further include a flange 48 that may fit over a top edge of the side wall 2 to assist in securing the lid 19 to the side wall 2 during smoking.
The downward pointing protrusions 47 may be arranged in any appropriate configuration or pattern to provide multiple condensation concentration points over the food being smoked. For example, as illustrated in
As illustrated, the lid 19 comprises 28 downward pointing protrusions 47. In an embodiment, more or fewer downward pointing protrusions 47 may be present. For example, in a variation, a total of 12 or more downward pointing protrusions 47 may be present. Furthermore, the size of the downward pointing protrusions 47 may be varied such that they occupy a greater or lesser percentage of the area of the lid 19 than as illustrated.
As illustrated, the lid 19 is constructed from a single flat sheet with the downward pointing protrusions 47 formed therein. In a variation, the lid may be of double-wall construction with a gap between the walls similar to as discussed with reference to the side wall 2. In another variation illustrated in
Exemplary dimensions of the embodiment of the food smoker 1 illustrated in
The side wall 2, base 9, and diffuser plate 25, may be made from steel or any other appropriate material or combination of materials, such as other types of metals (including stainless steel and/or cold rolled steel), coated metals or ceramics. The lid 19, first food rack 18a, second food rack 18b, water bowl 28, drawer 29, may be made from stainless steel or any other appropriate material or combination of materials, such as other types of metals (including non-stainless steel), coated metals or ceramics.
A method of smoking food will now be described. The method may use the food smoker 1. First steps of the method may include inserting wood chips and/or other flavoring sources into a ceramic chip bowl and inserting the ceramic chip bowl into the interior of a smoker. The method may further include positioning food to be smoked on one or more food racks positioned above the ceramic chip bowl within the smoker. After the food is positioned, a lid may be placed onto the smoker over the food. The food being smoked may include, for example, pork, beef, lamb, sausage, seafood, poultry and/or any other appropriate type of meat that may be smoked. Such meat may be in any appropriate form, including for example, chops, roasts, steaks, shredded, and/or ground. The food being smoked may include, for example, non-meats.
Heat may be produced within the smoker, causing the wood chips and/or other flavoring sources to produce smoke within the smoker, thus flavoring and smoking the food. The heat may be produced by burning propane within a lower portion of the smoker. The heat may also cause water disposed in a water bowl within the smoker to turn to steam. The production of heat may be controlled to produce, for example, a temperature of about 110° C. within the interior of the smoker. Such an interior temperature may be maintained for several hours (e.g., 10, 15 or more hours).
The method may further include condensing liquid on an underside of the lid and collecting, by gravity, the condensate at a lowermost portion of each protrusion of the plurality of protrusions. The method may further include dripping the collected condensation from the plurality of protrusions onto the food being smoked.
While various embodiments have been described in detail, it is apparent that further modifications and adaptations of the invention will occur to those skilled in the art. However, it is to be expressly understood that such modifications and adaptations are within the spirit and scope of the present invention.
This application claims priority from U.S. Provisional Patent Application No. 61/502,854, filed Jun. 29, 2011, entitled “Improved Efficiency Food Smoker,” the entire disclosure of which is incorporated by reference herein.
Number | Date | Country | |
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61502854 | Jun 2011 | US |