[특허]Cooking utensil

Bose Corporation

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Cooking utensil

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A47J-027/00
미국특허분류(USC)	220/573.1; 220/573.3; 220/627; 220/626; 220/912; 219/622; 219/621; 219/620
출원번호	US-0038489 (2011-03-02)
등록번호	US-8602248 (2013-12-10)
발명자 / 주소	Mathieu, Randall
출원인 / 주소	Bose Corporation
대리인 / 주소	Dingman, Brian M.
인용정보	피인용 횟수 : 2 인용 특허 : 35

초록

A cooking utensil for use with an induction cooktop having a cooktop surface and an induction heating coil. The cooking utensil has an inner wall made from an electrically conductive material, an outer wall made from an electrically non-conductive material, and a gap between the inner and outer walls. There is an intermediate wall in the gap. The intermediate wall divides the gap into an inner chamber between the inner wall and the intermediate wall and an outer chamber between the outer wall and the intermediate wall.

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1. A cooking utensil that is adapted for use with an induction cooktop having a cooktop surface and an induction heating coil, the cooking utensil comprising: an inner wall comprising an innermost wall and a ferromagnetic target that is in thermal contact with the innermost wall, where the target is adapted to be heated by induction;an outer wall comprising an electrically non-conductive material;wherein the inner and outer walls are spaced from one another except at a joint location where they are coupled together, to thereby define a gap between the inner and outer walls;wherein the inner wall defines a bottom portion located closest to the cooktop surface during operation of the induction heating coil and a sidewall portion located farther from the cooktop surface during operation of the induction heating coil, wherein the outer wall defines a bottom portion located on the cooktop surface during operation of the induction heating coil and a sidewall portion spaced above the cooktop surface during operation of the induction heating coil; anda thin, solid, generally annular intermediate wall in the gap and not in direct contact with the target, the intermediate wall dividing the gap into an inner closed chamber between the inner wall and the intermediate wall and an outer closed chamber between the outer wall and the intermediate wall, wherein the outer chamber extends along the outer wall for at least most of the length of the sidewall portion of the outer wall, and wherein the intermediate wall prevents the flow of heated gas from the inner chamber into the outer chamber and has a relatively low thermal conductivity to inhibit heat transfer along the length of the intermediate wall. 2. The cooking utensil of claim 1 further comprising a layer of thermally insulating material positioned between the inner wall and the outer wall. 3. The cooking utensil of claim 2 wherein the layer of thermally insulating material has an area that substantially covers at least the bottom portion of the outer wall. 4. The cooking utensil of claim 2 wherein the intermediate wall is in contact with the layer of thermally insulating material and one or both of the inner wall and the outer wall. 5. The cooking utensil of claim 4 wherein the intermediate wall contacts the outer wall proximate the joint location. 6. The cooking utensil of claim 5 wherein the joint location is proximate both the inner wall and the outer wall sidewall portions that are farthest from the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface. 7. The cooking utensil of claim 4 wherein the layer of thermally insulating material defines an outer edge closest to the sidewall portion of the outer wall, and wherein the intermediate wall is in contact with the layer of thermally insulating material proximate its outer edge. 8. The cooking utensil of claim 4 wherein the intermediate wall does not contact the inner wall. 9. The cooking utensil of claim 2 wherein the intermediate wall has two ends, a first end in contact with the layer of thermally insulating material and a second end in contact with the inner wall. 10. The cooking utensil of claim 9 wherein the second end of the intermediate wall contacts the sidewall portion of the inner wall, without contacting the outer wall. 11. The cooking utensil of claim 9 wherein the layer of thermally insulating material defines an outer edge closest to the sidewall portion of the outer wall, and wherein the first end of the intermediate wall is in contact with the layer of thermally insulating material proximate its outer edge. 12. The cooking utensil of claim 9 wherein the intermediate wall does not contact the outer wall. 13. The cooking utensil of claim 2 wherein: the target is directly above the layer of thermally insulating material;the layer of thermally insulating material defines an outer edge closest to the sidewall portion of the outer wall;the intermediate wall is in contact with the layer of thermally insulating material proximate its outer edge; andthe intermediate wall is in contact with one of the inner and outer walls. 14. The cooking utensil of claim 1 wherein the intermediate wall comprises a flared generally annular member. 15. The cooking utensil of claim 1 wherein the intermediate wall is flared such that it is wider at one end than the other end. 16. The cooking utensil of claim 1 wherein the layer of thermally insulating material defines an outer edge closest to the sidewall portion of the outer wall, and wherein the generally annular member contacts the layer of thermally insulating material proximate its outer edge. 17. The cooking utensil of claim 1 wherein the intermediate wall is relatively rigid. 18. The cooking utensil of claim 1 wherein the intermediate wall is flexible. 19. The cooking utensil of claim 1 wherein the intermediate wall is reflective of infrared radiation. 20. The cooking utensil of claim 1 wherein the intermediate wall has a low emissivity. 21. The cooking utensil of claim 1 wherein the intermediate wall is comprised of thermally insulating material. 22. The cooking utensil of claim 21 wherein the layer of thermally insulating material is against the bottom portion of the outer wall and contacts the sidewall portion of one or both of the inner wall and outer wall. 23. The cooking utensil of claim 21 wherein the thermally insulating material is against the target and contacts the sidewall portion of one or both of the inner wall and outer wall. 24. A cooking utensil that is adapted for use with an induction cooktop having a cooktop surface and an induction heating coil, the cooking utensil comprising: an outer wall that is the outermost wall of the cooking utensil, the outer wall comprising an electrically non-conductive material, a bottom portion located on the cooktop surface during operation of the induction heating coil, and a sidewall portion spaced above the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface;a layer of thermally insulating material on the inside of the outer wall, wherein the layer of thermally insulating material has an area that substantially covers the bottom portion of the outer wall and defines an outer edge closest to the sidewall portion of the outer wall;an inner wall comprising the innermost wall of the cooking utensil and a ferromagnetic target that is adapted to be heated by induction, wherein the target is directly above and spaced from the layer of thermally insulating material, the innermost wall defining a bottom portion located closest to the cooktop surface during operation of the induction heating coil and a sidewall portion located farther from the cooktop surface during operation of the induction heating coil;wherein the innermost and outer walls are spaced from one another by a gap, except at a joint location where they are coupled together, wherein the joint location is proximate both the innermost wall sidewall portion farthest from the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface and the outer wall sidewall portion farthest from the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface; anda thin, solid generally annular partition, the partition positioned in the gap between the innermost wall and the outer wall, wherein the partition is in contact with the layer of thermally insulating material proximate its outer edge and the partition is in contact with one or both of the outer wall and the inner wall proximate the joint location, the partition not in direct contact with the target, the partition dividing the gap into an inner closed chamber between the inner wall and the partition and an outer closed chamber between the outer wall and the partition, wherein the outer chamber extends along the outer wall for at least most of the length of the sidewall portion of the outer wall, and wherein the partition prevents the flow of heated gas from the inner chamber into the outer chamber and has a relatively low thermal conductivity to inhibit heat transfer along the length of the partition. 25. The cooking utensil of claim 24 wherein the partition contacts both the outer wall and the inner wall. 26. The cooking utensil of claim 24 wherein the partition does not contact the inner wall. 27. A method for manufacturing a cooking utensil, comprising: providing an inner wall that includes at least some electrically conductive material that is configured to be a target for an induction heating coil;providing an outer wall formed of an electrically non-conductive material;providing a layer of insulation;providing a thin, solid, generally annular intermediate wall;locating the layer of insulation on the outer wall;locating the intermediate wall on the layer of insulation; andcoupling the inner and outer walls at a joint location such that the layer of insulation and the intermediate wall are located between the inner wall and outer wall, with the intermediate wall in contact with the layer of insulation and in contact with at least one of the inner wall and the outer wall;wherein the inner and outer walls are spaced from one another except at the joint location, to thereby define a gap between the inner and outer walls;wherein the inner wall defines a bottom portion located closest to the cooktop surface during operation of the induction heating coil and a sidewall portion located farther from the cooktop surface during operation of the induction heating coil, wherein the outer wall defines a bottom portion located on the cooktop surface during operation of the induction heating coil and a sidewall portion spaced above the cooktop surface during operation of the induction heating coil; andwherein the intermediate wall is located in the gap and not in direct contact with the target, the intermediate wall dividing the gap into an inner closed chamber between the inner wall and the intermediate wall and an outer closed chamber between the outer wall and the intermediate wall, wherein the outer chamber extends along the outer wall for at least most of the length of the sidewall portion of the outer wall, and wherein the intermediate wall prevents the flow of heated gas from the inner chamber into the outer chamber and has a relatively low thermal conductivity to inhibit heat transfer along the length of the intermediate wall. 28. The method of claim 27 wherein the intermediate wall is constructed and arranged such that it has two ends, and the intermediate wall contacts the layer of insulation at or proximate a first end of the intermediate wall and contacts one of the inner wall and the outer wall at or proximate a second end of the intermediate wall. 29. The method of claim 28 wherein the intermediate wall is further constructed and arranged such that no other part of the intermediate wall contacts either the inner wall or the outer wall.

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Cooking utensil

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Cooking utensil

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이 특허에 인용된 특허 (35)

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