Induction-based heated delivery container system

• US 6,350,972 B1
• Filed: 05/26/2000
• Issued: 02/26/2002
• Est. Priority Date: 05/26/1999
• Status: Expired due to Term

• Current Assignee: Aladdin Temp-Rite LLC (International Corporate Activities SA)
• Original Assignee: Aladdin Temp-Rite LLC (International Corporate Activities SA)
• Inventors: Wright, David Gregg, LaFevor, Jack Wendell
• Primary Examiner(s): Leung, Philip H.
• Application Number:
  US09/579,204
• Time in Patent Office: 641 Days
• Field of Search: 219/621, 219/620, 219/622, 219/624, 219/663, 219/667, 219/626, 219/627, 126/246, 126/375, 99D/IG.14, 994/51
• US Class Current: 219/621
• CPC Class Codes: A47J 36/2494 using heat storage elements or materials, e.g. lava stones
• CPC Class Codes: A47J 47/14 Carriers for prepared human food lunch boxes, picnic boxes, or the like A45C11/20
• CPC Class Codes: H05B 6/12 Cooking devices
• CPC Class Codes: Y10S 99/14 Induction heating

Abstract

A system for heating food delivery containers which comprises: a container for delivering heated food which comprises at least one food compartment having at least one self-regulating heat storage member disposed therein, wherein the self-regulating heat storage member comprising a magnetic material and, optionally, a heat storage material; and an induction generating source which is capable of heating the self-regulating material to a predetermined temperature. The system further comprises an automatic shut-off mechanism which is capable of turning off the induction generating source when the heat storage member reaches the predetermined temperature.

Claims

1. A container for delivering heated food which comprises:

at least one compartment having an upper panel and a lower panel, wherein a first self-regulating heat storage member is disposed within said lower panel and a second self-regulating heat storage member is disposed within said upper panel,

said first and second self-regulating heat storage members comprise a magnetic material which are capable of being heated by means of induction to a predetermined temperature, said predetermined temperature being at or prior to reaching the Curie point of said magnetic material.

2. The container according to claim 1 wherein said magnetic material is selected from the group consisting of:

nickel, chrome, iron, and mixtures thereof.

3. A container for delivering heated food which comprises:

at least one compartment having at least one self-regulating heat storage member disposed therein, wherein said self-regulating heat storage member comprises a magnetic material which is capable of being heated by means of induction to a predetermined temperature, said predetermined temperature being at or prior to reaching the Curie point of said magnetic material, and a heat storage material disposed about said magnetic material, wherein said heat storage material acts as a heat sink or storage battery, said magnetic material comprising holes or slits therethrough and panels of said heat storage material are disposed within said holes or slits.

4. The container according to claim 3 wherein said heat storage material comprises a material selected from the group consisting of aluminum, cast iron and mixtures thereof.

5. The container according to claim 3, wherein said magnetic material is selected from the group consisting of:

nickel, chrome, iron, and mixtures thereof.

6. The container according to claim 3 wherein said heat storage material is attached to said magnetic material by casting, cladding, or combination thereof.

7. A system for heating food delivery containers which comprises:

a container for delivering heated food which comprises at least one food compartment having an upper panel and a lower panel, wherein a first self-regulating heat storage member is disposed within said lower panel and a second self-regulating heat storage member is disposed within said upper panel, said first and second self-regulating heat storage members comprising a magnetic material; and

a means for generating induction energy which is capable of heating said magnetic material to a predetermined temperature, said predetermined temperature being at or prior to reaching the Curie point of said magnetic material.

8. The system according to claim 7 further comprising an automatic shut-off control which is capable of turning off said induction generating means when said magnetic material reaches said predetermined temperature.

9. The system according to claim 7 wherein said induction generating means comprises at least one means for generating a magnetic field disposed substantially in alignment with said first and second heat storage members when said container is disposed adjacent to said induction generating means.

10. A system for heating at least one food delivery container which comprises:

a container for delivering heated food which comprises at least one compartment having at least one self-regulating heat storage member disposed therein, said self-regulating heat storage member comprising a magnetic material and a heat storage material in thermal contact with said magnetic material, said magnetic material having holes or slits therethrough and panels of said heat storage material disposed in said holes or slits, wherein said heat storage material acts as a heat sink and storage battery; and

a means for generating induction energy which is capable of heating said magnetic material to a predetermined temperature, said predetermined temperature being at or prior to reaching the Curie point of said magnetic material.

11. The system according to claim 10 wherein said magnetic material is selected from the group consisting of:

nickel, chrome, iron and mixtures thereof.

12. The system according to claim 10 wherein said heat storage material is selected from the group consisting of:

cast iron, aluminum and mixtures thereof.

13. A method of heating a food delivery container which comprises:

placing a container about an induction generating means, said container comprising at least one food compartment having at least one self-regulating heat storage member disposed therein, said self-regulating heat storage member comprising a magnetic material and a heat storage material in thermal contact with said magnetic material, said magnetic material having holes or slits therethrough and panels of said heat storage material disposed in said holes or slits, wherein said heat storage material acts as a heat sink and storage battery;

activating said induction generating means to heat said heat storage member to a predetermined temperature; and

deactivating said induction generating means once the heat storage member reaches said predetermined temperature, said predetermined temperature being at or prior to reaching the Curie point of said magnetic material.

14. The method according to claim 13 wherein said deactivation step occurs automatically at said predetermined temperature.