Low thermal mass cooking utensil

• US 3,971,361 A
• Filed: 07/15/1974
• Issued: 07/27/1976
• Est. Priority Date: 07/15/1974
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Hurko, Bohdan
• Primary Examiner(s): Sprague, Kenneth W.
• Assistant Examiner(s): Schwartz, Larry I.
• Application Number:
  US05/488,526
• Time in Patent Office: 743 Days
• Field of Search: 126/390, 126/400, 220/66, 220/70, 220/DIG. 14, 220/64, 165/185, 215/1 C, 206/818 X, 117/94, 117/160, 428/422
• US Class Current: 126/390.1
• CPC Class Codes: A47J 36/04 the materials being non-metallic
• CPC Class Codes: F24C 15/102 electrically heated
• CPC Class Codes: H05B 2203/014 Heaters using resistive wires or cables not provided for in H05B3/54
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 3/26 heating conductor mounted on insulating base for transparent areas H05B3/84, H05B3/86
• CPC Class Codes: H05B 3/72 Plates of sheet metal
• CPC Class Codes: Y10S 206/818 Magnet

Abstract

A lightweight cooking utensil with raised side walls and a high temperature flexible plastic sheet stretched across the bottom portion of the side walls and sealed thereto to form a leak-proof container. The utensil is adapted to be heated on a low energy, low temperature solid plate surface heating unit with a slight convex top surface so that the plastic sheet of the utensil will conform to the top surface and make a highly efficient thermal coupling.

Claims

1. A low thermal mass cooking utensil for surface cooking comprising generally raised side walls and a high temperature resilient plastic sheet that is stretched taut and sealed across the bottom edge of the side walls to form a leak-proof bottom wall, so that the weight of the cooking load placed in the utensil will cause the bottom wall to stretch and conform to the top surface of a supporting surface heating means for good thermal coupling, and the principle manner of applying heat to the utensil is by thermal conduction through the resilient bottom wall.

2. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet is a fiber glass cloth impregnated with polytetrafluoroethylene.

3. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet is a polyimide material.

4. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet is an aromatic polyester material.

5. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet is a polyphenylene sulfide material.

6. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet is a polyacryl sulfone material.

7. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said resilient plastic sheet includes magnetic particles that are adapted to adhere the resilient sheet to a metallic plate surface heating unit on which the utensil is to be supported for cooking purposes.

8. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said side walls are formed of thin gauge aluminum of a thickness of about 0.050 inches, and the resilient plastic bottom wall is stretched tightly across the bottom edge of the side walls, and is capable of withstanding frying temperatures that may reach about 450°

F.

9. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said side walls are formed of foamed urethane material.

10. A low thermal mass cooking utensil for surface cooking as recited in claim 9 wherein at least the outer surface of the said side walls is metallized so as to present a metallic appearance.

11. A low thermal mass cooking utensil for surface cooking as recited in claim 8 wherein the entire inner surface of the utensil comprises a thin layer of non-stick resinous material such as polytetrafluoroethylene.

12. A low thermal mass cooking utensil for surface cooking as recited in claim 9 wherein the entire inner surface of the utensil is coated with a thin layer of non-stick resinous material such as polytetrafluoroethylene.

13. A low thermal mass cooking utensil for surface cooking as recited in claim 9 wherein the outer surface of the side walls is metallized so as to present a metallic appearance.

14. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the inner surface of the utensil is finished with a thin layer of non-stick resinous material such as polytetrafluoroethylene.

15. A low thermal mass cooking utensil for surface cooking as recited in claim 1 wherein the said side walls are formed of a foamed plastic material.

16. The combination of a low thermal mass cooking utensil and a low thermal mass solid plate surface heating unit, the cooking utensil comprising generally raised side walls and a high temperature flexible plastic sheet sealed across the bottom portion of the side walls to form a leakproof supporting bottom wall, the solid plate surface heating unit comprising a thin top plate as its supporting surface such that the flexible bottom wall of the utensil is adapted to conform to the top surface of the supporting plate for good thermal coupling between the utensil and the surface heating unit, and heating means cooperating with the said top plate for raising the temperature of the plate, and hence the cooking utensil that is supported thereon.

17. The combination of a low thermal mass cooking utensil and a low thermal mass solid plate surface heating unit as recited in claim 16 wherein the top plate of the surface heating unit has a slight convex formation for making a wide area thermal coupling with the flexible bottom wall of the utensil.

18. The combination of a low thermal mass cooking utensil and a low thermal mass solid plate surface heating unit as recited in claim 16 wherein the said flexible plastic sheet is capable of withstanding temperatures that may reach about 450°

F.

19. The combination of a low thermal mass cooking utensil and a low thermal mass solid plate surface heating unit as recited in claim 18 wherein the said flexible plastic sheet is a fiber glass cloth impregnated with polytetrafluorethylene.