초록 ▼

A solar oven that includes a multiple zone concentrator and a diffuse focal zone is disclosed. The solar oven may include at least one element of symmetry. In such a case, the diffuse focal zone substantially aligns with the oven symmetry element. The diffuse focal zone may include a central region

A solar oven that includes a multiple zone concentrator and a diffuse focal zone is disclosed. The solar oven may include at least one element of symmetry. In such a case, the diffuse focal zone substantially aligns with the oven symmetry element. The diffuse focal zone may include a central region and a peripheral region. The multiple zone concentrator has at least one reflective member for directing radiation to a plurality of portions of the diffuse reflective zone. The reflective member has a first reflective zone and a second reflective zone. The first reflective zone may include at least one of zonal element of symmetry offset from the oven symmetry element. Also, the first reflective zone has a profile that captures and directs radiation to at least a portion of the peripheral region of the diffuse focal zone. The second reflective zone is adjacent a first end of the first reflective zone and has a profile that captures and directs radiation to at least a portion of the central region of the diffuse focal zone. A receptor support is provided for supporting a receptor substantially within the diffuse focal zone. Optionally, a booster adjacent a distal end of the first reflective zone is provided for directing additional radiation to at least one of the peripheral region and the central region of the plurality of portions of the diffuse focal zone.

대표청구항 ▼

A solar oven that includes a multiple zone concentrator and a diffuse focal zone is disclosed. The solar oven may include at least one element of symmetry. In such a case, the diffuse focal zone substantially aligns with the oven symmetry element. The diffuse focal zone may include a central region

A solar oven that includes a multiple zone concentrator and a diffuse focal zone is disclosed. The solar oven may include at least one element of symmetry. In such a case, the diffuse focal zone substantially aligns with the oven symmetry element. The diffuse focal zone may include a central region and a peripheral region. The multiple zone concentrator has at least one reflective member for directing radiation to a plurality of portions of the diffuse reflective zone. The reflective member has a first reflective zone and a second reflective zone. The first reflective zone may include at least one of zonal element of symmetry offset from the oven symmetry element. Also, the first reflective zone has a profile that captures and directs radiation to at least a portion of the peripheral region of the diffuse focal zone. The second reflective zone is adjacent a first end of the first reflective zone and has a profile that captures and directs radiation to at least a portion of the central region of the diffuse focal zone. A receptor support is provided for supporting a receptor substantially within the diffuse focal zone. Optionally, a booster adjacent a distal end of the first reflective zone is provided for directing additional radiation to at least one of the peripheral region and the central region of the plurality of portions of the diffuse focal zone. mounted to said fire bowl, said second shelf being movable between a stowage position within said fire bowl to a usage position located exteriorly of said fire bowl. 6. The apparatus of claim 5 wherein said first shelf is aligned with said second shelf in both said stowage position and said usage position. 7. The apparatus of claim 5 wherein said first shelf is situated atop said second shelf in a staggered position during said stowage position. 8. The apparatus of claim 1 wherein said fire bowl terminates into at least one end portion and said shelf is pivotally mounted to said end portion. 9. The apparatus of claim 1 wherein said fire bowl is mounted on said supporting frame, said supporting frame having at least one handle, said shelf resting on said handle when said shelf is in said usage position. 10. The apparatus of claim 1 wherein said supporting frame including a pair of leg members, each said leg member being pivotally movable between a retracted position and an extended position, said leg members adapted to be in contact with the supporting surface in both said retracted position and said extended position, said fire bowl being located further from said supporting surface when said leg members are in said extended position as opposed to said retracted position. 11. The apparatus of claim 1 wherein said shelf in said usage position has a working surface. 12. The apparatus of claim 11 wherein said shelf has a working surface in said usage position and a utensil retaining groove so the utensil is located beneath said working surface when said shelf is in said usage position. 13. The apparatus of claim 1 wherein said shelf comprises at least one utensil retaining groove. 14. The apparatus of claim 1 further comprising a lid mountable on said fire bowl. 15. The apparatus of claim 14 further comprising a grill situated within said fire bowl and wherein said lid is pivotally mounted to said fire bowl, said lid being movable in a closed position wherein said lid covers said grill to an open position wherein said lid allows access to said grill. 16. The apparatus of claim 1 wherein said fire bowl is mounted on a supporting frame, said apparatus further comprises a pair of leg members being pivotally mounted on said supporting frame and movable between a retracted position and an extended position, said leg members adapted to be in contact with a supporting surface in both said retracted position and said extended position, said fire bowl being located further from the supporting surface when said leg members are in said extended position as opposed to said retracted position. 17. The apparatus of claim 16 wherein said fire bowl has an internal chamber and said apparatus further comprises a grill located within said internal chamber, a lid mountable on said fire bowl and at least two shelves, each of said shelves being pivotally mounted to said fire bowl, each of said shelves being movable between a stowage position within said fire bowl to a usage position located exteriorly of said fire bowl. 18. The cooking apparatus as defined in claim 16 comprising: said supporting frame including a pair of main frame members which are spaced apart, each said main frame member being channel shaped defining an internal cavity, each said leg member being mounted within a said internal cavity. 19. The cooking apparatus as defined in claim 16 wherein: said leg members being crossed when in said retracted position. 20. The cooking apparatus as defined in claim 16 comprising: said leg members being located substantially parallel and spaced apart when in said extended position. 21. The cooking apparatus as defined in claim 16 wherein: one of said leg members having low frictional rolling means to facilitate moving of said cooking apparatus from one local to another. 22. The cooking apparatus as defined in claim 16 comprising: manually operable tightening means for securing of said leg members when in said extended positi on. 23. The cooking apparatus as defined in claim 16 comprising: latching means for locking of said leg members in said retracted position. 24. The apparatus of claim 1 wherein said fire bowl comprises a bottom which is connected to a pair of sidewalls with said bottom being located between said sidewalls, said bottom has an arcuate shape which extends from a left side to a right side, said sidewalls having a free upper edge. 25. A barbecue cooking system comprising: a fire bowl comprising peripheral walls, a continuous bottom and an open top, said peripheral walls defining an internal chamber, said peripheral walls comprising a top portion and an internal surface; a grill located within said internal chamber; a lid mountable on said fire bowl; a stand for supporting said fire bowl; at least one handle; and at least one shelf pivotally mounted to said peripheral walls at said internal surface and below said top portion of said fire walls, said shelf being foldable into said fire bowl during a storage position and extendable from said fire bowl during a usage position, said handle supporting said shelf during said usage position. 26. The system of claim 25 further comprising a second shelf pivotally mounted to said peripheral walls at said internal surface and below said top portion of said fire walls, said second shelf being foldable into said fire bowl during a stowage position and extendable from said fire bowl during a usage position. 27. The system of claim 25 wherein said first shelf is aligned with said second shelf in both said stowage position and said usage position. 28. The system of claim 25 wherein said shelf comprises at least one working surface and a means for holding utensils. 29. The system of claim 28 wherein said means for holding said utensils comprises a utensil retaining groove and said system further comprising at least one utensil, said utensil being positioned within said utensil retaining groove of said shelf. 30. The system of claim 25 wherein said fire bowl is situated upon said stand during a usage position and said stand being designed to fit onto said lid during a stowage position. 31. The system of claim 30 wherein said stand comprises at least one leg, said leg is retractable and extendable. 32. The system of claim 31 further comprising a manually operated tightening device and a latching device, said tightening device being designed for securing said leg when in said extended position, said latching device being designed for locking said leg in said retracted position. 33. The system of claim 25 wherein said lid is pivotally mounted onto said fire bowl, said lid being movable from a closed position wherein said lid covers said grill to an open position wherein said lid allows access to said grill. 34. The system of claim 25 wherein said internal chamber comprises a compartment for retaining burnable material. 35. The system of claim 25 further comprising a propane tank, said tank being situated within said fire bowl during said stowage position and externally of said fire bowl during said usage position. 36. The system of claim 25 wherein said fire bowl having a bottom which is connected to a pair of planar sidewalls with said bottom being located between said sidewalls, said bottom has an arcuate shape which extends from a fore end to an aft end, and sidewalls having a free upper edge. 37. The system of claim 25 wherein said shelf is foldable into said internal chamber. 38. 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