Radiant baffle assembly for gas-fired cooker

• US 5,129,312 A
• Filed: 04/16/1991
• Issued: 07/14/1992
• Est. Priority Date: 04/16/1991
• Status: Expired due to Term

• Current Assignee: Weber-Stephen Products LLC (Weber-Stephen Mexico Holdings LLC)
• Original Assignee: The Ducane Company, Inc.
• Inventors: Berger, Bernard B.
• Primary Examiner(s): Simone, Timothy F.
• Application Number:
  US07/685,658
• Time in Patent Office: 455 Days
• Field of Search: 99/339, 99/340, 99/375, 99/376, 99/385, 99/390, 99/393, 99/395, 99/400, 99/401, 99/482, 99/419, 99/421 H, 99/421 V, 99/447, 126/86, 126/41 R, 126/39 J, 126/39 D, 126/39 R
• US Class Current: 99/340
• CPC Class Codes: A23B 4/052 Smoke generators ; Smoking apparatus A23B4/056 takes precedence
• CPC Class Codes: A47J 37/0713 with gas burners
• CPC Class Codes: A47J 37/0727 with gas burners

Abstract

A radiant baffle assembly for gas-fired outdoor grills wherein food mounted on a spit in a cooking zone is cooked from the side by a vertically extending baffle structure which is heated to radiant temperatures by its contact with combustion gases and radiant energy provided by burning gaseous fuel from a horizontal gas burner. A forwardly facing surface of the baffle structure radiates heat transversely toward a side of the cooking zone, while an upper portion of this surface directs rising combustion gases transversely toward the same side of the cooking zone. The baffle structure may include a baffle member having ridges and grooves in a lower portion for enhancing heating of the baffle structure and its radiation of heat energy.

Claims

1. A radiant baffle assembly for a cooking unit, said cooking unit including food support means for supporting food within a cooking zone, and fuel burner means having a burner element extending horizontally adjacent to a side of the cooking zone, said baffle assembly comprising:

baffle means for transferring into said side of the cooking zone thermal energy generated by combustion of a fuel discharged from said burner element, said baffle means comprising a surface positioned to radiate a substantial portion of said thermal energy into said side of the cooking zone, and an upper portion extending upwardly relative to said burner element and transversely toward said side of the cooking zone to direct into said side of the cooking zone hot combustion gases flowing upward from the combustion of said fuel; and

,

means for mounting said baffle means relative to said burner element so that said baffle means receives said thermal energy from the combustion of said fuel;

said mounting means comprising a rear member rearward of said burner element, an upper member extending forward of said burner element, and connecting means extending between and interconnecting said rear member and said upper member;

a lower segment of said baffle means being secured to said rear member and an upper segment of said baffle means being secured to a forward part of said upper member; and

the upper portion of said baffle means being supported between said lower segment and said upper segment such that said upper portion is free to thermally expand and contract relative to said connecting means.

2. A radiant baffle assembly according to claim 1 wherein said baffle means comprises a lower portion having at least one ridge positioned to receive and to radiate a portion of said thermal energy into said side of the cooking zone, and wherein said lower portion is positioned between said upper portion and said lower segment of the baffle means such that said lower portion and said upper portion are both free to thermally expand and contract relative to said connecting means.

3. A radiant baffle assembly according to claim 2 wherein at least 80% of said transferred thermal energy is radiated into said side of the cooking zone by said surface.

4. A radiant baffle assembly according to claim 2 wherein said lower portion has a plurality of horizontally extending corrugations forming a corrugated surface for radiating said thermal energy.

5. A radiant baffle assembly according to claim 4 wherein said corrugations comprise a plurality of horizontally extending ridges each connected to another by a groove to provide a smoothly sinuous profile in transverse cross section.

6. A radiant baffle assembly according to claim 5 wherein said upper portion of said baffle means comprises a smoothly-curved concave surface.

7. A radiant baffle assembly according to claim 1 wherein said upper portion of said baffle means comprises a smoothly-curved concave surface.

8. A radiant baffle assembly according to claim 4 wherein said corrugations comprise a plurality of horizontally extending ridges each connected to another by a groove to provide a sawtooth profile in transverse cross section.

9. A radiant baffle assembly according to claim 8 wherein said upper portion of said baffle means comprises a substantially planar surface.

10. A radiant baffle assembly according to claim 1 wherein said upper portion of said baffle means comprises a substantially planar surface.

11. A radiant baffle assembly according to claim 2 wherein said baffle means comprises a single piece of stamped metal.

12. A radiant baffle assembly according to claim 11 wherein said metal is corrosion and heat resistant stainless steel.

13. A radiant baffle assembly according to claim 4 wherein said corrugations comprise at least three ridges each connected to another by a groove.

14. A radiant baffle assembly according to claim 1 wherein said connecting means comprises a pair of spaced-apart vertically-extending side members positioned in opposing relation to each other, and wherein said rear member and said upper member of said mounting means each extend between and interconnect said side members.

15. A radiant baffle assembly according to claim 14 further comprising front wall means extending horizontally between and connecting said side members, said front wall means comprising a wall portion extending from a level below to a level above a burner member of said burner means so as to shield said burner member from a horizontal heating zone forward of said wall portion.

16. A radiant baffle assembly according to claim 14 further comprising front wall means extending horizontally between and connecting said side members, said front wall means comprising a depending wall portion extending below the level of a burner member of said burner means so as to shield at least part of a rear wall of a housing means defining a horizontal heating zone forward of said depending wall portion.

17. A radiant baffle assembly according to claim 16 wherein said food support means comprises grill means, wherein said cooking unit further includes grid means for supporting a bed of refractory material beneath said grill means, and wherein said depending wall portion comprises means for supporting an edge part of said grill means and an edge part of said grid means.

18. A radiant baffle assembly according to claim 14 wherein an upper end portion of each of said side members extends above said upper member and comprises support means for engaging a corresponding end of a container to support said container in a position for receiving sufficient thermal energy to cause woodchips held in said container to burn and generate smoke for flavoring food supported by said food support means.

19. A radiant baffle assembly according to claim 18 wherein at least one aperture is provided in the upper baffle portion and in the upper member of said mounting means for conveying a portion of said hot combustion gases to said container to provide at least a portion of the thermal energy for burning the woodchips held in said container.

20. A radiant baffle assembly according to claim 1 wherein said mounting means further comprises bracket means mounted on said rear member for engaging a rear wall of a housing means to support said baffle means adjacent to said side of the cooking zone, said housing means defining at least part of the cooking zone.

21. A radiant baffle assembly according to claim 1 wherein the rear member of said mounting means defines a channel for housing an electrode means for providing an electrical spark for igniting the fuel discharged by said burner means.

22. A radiant baffle assembly according to claim 14 further comprising a horizontally extending rack means for supporting food in said cooking zone, and means carried by each of said side members for engaging a corresponding end of said rack means to support an intermediate section of said rack means in opposing relation to said baffle means.

23. A radiant baffle assembly according to claim 4 wherein said corrugations comprise a plurality of horizontally extending ridges each connected to another by a horizontally extending groove to provide said corrugated radiating surface, and wherein each of said ridges extends at least partially over a flame zone in which flames burn said fuel.

24. A radiant baffle assembly according to claim 14 wherein said rear member forms a backwall, wherein each of said side members forms a sidewall facing a corresponding side edge of said upper baffle portion, and wherein said back wall and said sidewalls are provided by a single piece of stamped metal.

25. A radiant baffle assembly according to claim 1 wherein said burner element is elongated along a burner axis parallel to said side of the cooking zone, said upper segment of the baffle means comprises an elongated strip, and said forward part of said upper member of the mounting means is elongated in a direction parallel to said burner axis and is secured to said baffle means along a substantial length of said elongated strip.

26. A radiant baffle assembly for a cooking unit, said cooking unit including food support means for supporting food within a cooking zone, and fuel burner means having a burner element extending horizontally adjacent to a side of the cooking zone, said baffle assembly comprising:

baffle means for transferring into said side of the cooking zone thermal energy generated by combustion of a fuel discharged from said burner element, said baffle means comprising a surface positioned to radiate a substantial portion of said thermal energy into said side of the cooking zone, and an upper portion extending upwardly relative to said burner element and transversely toward said side of the cooking zone to direct into said side of the cooking zone hot combustion gases flowing upward from the combustion of said fuel;

means for mounting said baffle means relative to said burner element so that said baffle means receives said thermal energy from the combustion of said fuel;

support means for supporting a container for holding woodchips in spaced relation over at lest a portion of said baffle means; and

,

means for conveying a portion of the hot combustion gases from combustion of said fuel to said container to provide thermal energy for burning woodchips held in said container to generate smoke for flavoring food supported by said food support means.

27. A radiant baffle assembly according to claim 26 wherein said mounting means comprises a pair of spaced-apart vertically-extending side members, wherein said support means comprises an upper end portion of each of said side members extending above said baffle means for engaging a corresponding end of said container, and wherein at lest one aperture is provided in said upper baffle portion for conveying said portion of the hot combustion gases to said container.

28. A radiant baffle assembly for a cooking unit, said cooking unit including food support means for supporting food within a cooking zone, and fuel burner means having a burner element extending horizontally adjacent to a side of the cooking zone, said baffle assembly comprising:

baffle means for transferring into said side of the cooking zone thermal energy generated by combustion of a fuel discharged from said burner element, said baffle means comprising a baffle member having an upper portion and a lower portion and providing a surface positioned to radiate a substantial portion of said thermal energy into said side of the cooking zone; and

,

means for mounting said baffle member relative to said burner element so that said baffle member receives said thermal energy from the combustion of said fuel;

said upper portion extending upwardly relative to said burner element and transversely toward said side of the cooking zone to direct into said side of the cooking zone hot combustion gases flowing upward from the combustion of said fuel;

said lower portion comprising a corrugated heat radiating surface formed by a plurality of horizontally extending ridges each connected to another by a horizontally extending groove;

said mounting means comprising a rear member, an upper member, and connecting means extending between and interconnecting said rear member and said upper member;

and a lower segment of said baffle member being secured to said rear member and an upper segment of said baffle member being secured to said upper member such that both the upper portion and the lower portion of said baffle member are free to thermally expand and contract relative to said connecting means.

29. A radiant baffle assembly according to claim 28 wherein said ridges extend at least partially over a flame zone in which flames burn said fuel such that at least said lower portion is heated to radiant temperatures by said hot combustion gases.