Meal delivery system

• US 6,034,355 A
• Filed: 06/08/1998
• Issued: 03/07/2000
• Est. Priority Date: 06/08/1998
• Status: Expired due to Fees

• Current Assignee: Unified Brands, Inc. (Electrolux Professional AB)
• Original Assignee: A La Cart, Inc.
• Inventors: Naderi, James, Wallace, Thomas E.
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): Patel, Vinod D
• Application Number:
  US09/093,538
• Time in Patent Office: 638 Days
• Field of Search: 219/387, 219/385, 219/386, 219/381, 219/523, 219/541, 219/506, 219/518, 99/483
• US Class Current: 219/387
• CPC Class Codes: A47B 2031/002 Catering trolleys
• CPC Class Codes: A47J 27/004 with integral electrical heating means drinking cups with integral heating means A47J36/2466
• CPC Class Codes: A47J 39/006 for either storing and preparing or for preparing food on serving trays, e.g. heating, thawing, preserving

Abstract

A meal delivery system for conveniently preparing, storing, transporting, rethermalizing and serving large volumes of food at multiple sites includes a new food serving pan equipped with an integral heating element and a first electrical connector, and a portable frame for receiving and supporting the food serving pan, and includes an electrical power supply means and at least one second electrical connector adapted to mate with the first electrical connector for providing electrical power to the heating element and heating the food serving pan when it is placed on the portable frame. The meal delivery system includes a heat control means comprising a removeable lid with first and second indicators for the food serving pan and a sensor means in the frame for detecting the first and second indicators and selectively controlling application of the electrical power delivered to the food serving pan for controlling the level of heat applied to foods within the food pan. A first preferred embodiment includes a mobile food service cart having a plurality of interior stations for receiving a corresponding number of food pans within the food service cart, each station including one second electrical connector for mating with the first electrical connector of the food pan. A second preferred embodiment includes a chafing dish serving frame adapted to support a single food serving pan on a serving surface and includes one second electrical connector for mating with the first electrical connector.

Claims

1. A meal delivery system for heating and storing of food contained within a serving pan, comprising:

a pan having walls and a bottom together defining an open food containment area for receipt of food therein, said pan further including integral therewith a first electrical connector disposed on one of said walls and a plurality of heating elements disposed in said bottom for heating of food within said containment area through conduction, each said heating element including its own temperature regulator; and

a portable frame adapted to receive said pan for support thereof, said frame having a second electrical connector adapted to mate with said first electrical connector when said pan is received within said frame for providing electrical power to said plurality of heating elements.

2. The meal delivery system of claim 1, wherein said portable frame comprises a food service cart.

3. The meal delivery system of claim 1, wherein said portable frame comprises a serving platform.

4. The meal delivery system of claim 1, wherein each said heating element comprises a surface heater.

5. The meal delivery system of claim 1, wherein each said temperature regulator comprises a thermostat.

6. The meal delivery system of claim 1, wherein said plurality of heating elements are electrically connected in series to said first electrical connector.

7. The meal delivery system of claim 1, wherein said pan includes four feet that protrude from said bottom thereof for supporting said pan at an elevation above a support surface.

8. The meal delivery system of claim 1, wherein said pan comprises an inner pan-shaped member nested within an outer pan-shaped member, said plurality of heating elements being disposed between said inner and outer members.

9. The meal delivery system of claim 8, wherein said inner member is sealed to said outer member for complete enclosure of said plurality of heating elements within said pan.

13. The meal delivery system of claim 1, wherein said lid includes indicia which indicates the level of heating of said pan for each of said two different orientations of said lid relative to said pan.

14. The meal delivery system of claim 13, further including a processor disposed on said food service cart which controls the level of heating as a function of the detection by said sensor of said indicator in said first location.

10. A meal delivery system for heating, storing, transporting and serving of food contained within a serving pan, comprising:

a pan including integral therewith a first electrical connector and a heating element connected thereto for heating of food within said pan through conduction;

a food service cart adapted to receive said pan for support thereof during storage and transportation, said food service cart including a second electrical connector adapted to mate with said first electrical connector when said pan is received therein for providing electrical power to said heating element for heating of food contained within said pan; and

a serving platform adapted to receive said pan for support thereon during serving of the food contained with said pan, said serving platform including a third electrical connector adapted to mate with said first electrical connector when said pan is received thereon for providing electrical power to said heating element for continued heating of food contained within said pan.

11. A method for the heating, storing, transporting, and serving of food contained within a serving pan, comprising the steps of:

storing and transporting food within a pan supported within a food service cart while heating the food within the pan, the pan including integral therewith a first electrical connector and a heating element for heating of the food within the pan through conduction, the food service cart including a second electrical connector mated with the first electrical connector when the pan is received therein for providing electrical power to the heating element;

transferring the pan from the food service cart onto a serving platform; and

serving food from the pan supported on the serving platform located on a support surface while heating the food, the serving platform including a third electrical connector mated with the first electrical connector when the pan is supported thereon for providing electrical power to the heating element.

12. A meal delivery system for heating, storing, and transporting of food contained within a serving pan, comprising:

a pan including integral therewith a first electrical connector and a heating element connected thereto for heating of food within said pan through conduction;

a lid adapted to fit over said pan in covering relation thereto only in two different orientations, said lid including an indicator located thereon such that said indicator is disposed relative to said pan in a first location when said lid is in a first one of said two orientations, and such that said indicator is disposed relative to said pan in a second, different location when said lid is in a second one of said two orientations; and

a food service cart adapted to receive said pan for support thereof during storage and transportation, said food service cart including a second electrical connector adapted to mate with said first electrical connector when said pan is received therein for providing electrical power to said heating element for heating of food contained within said pan, and further including a sensor disposed thereon such that said sensor only detects said indicator when in said first location.

15. A meal delivery system for heating, storing, and transporting of food contained within a serving pan, comprising:

a pan including integral therewith a first electrical connector and a heating element connected thereto for heating of food within said pan through conduction;

a lid adapted to fit over said pan in covering relation thereto in two different orientations, said lid including first and second indicators located thereon such that each indicator is disposed relative to said pan in a first location when said lid is in a first one of the two different orientations, and such that each indicator is disposed relative to said pan in a second, different location when said lid is in a second one of the two different orientations; and

a food service cart adapted to receive said pan for support thereof during storage and transportation, said food service cart including a second electrical connector adapted to mate with said first electrical connector when said pan is received therein for providing electrical power to said heating element for heating of food within said pan, and further including two sensors disposed thereon such that a first said sensor detects said first indicator only when in said first location, and a said second sensor detects said second indicator only when in said second location.

16. The meal delivery system of claim 15, wherein each said indicator comprises a magnet and each said sensor comprises a reed switch.

17. The meal delivery system of claim 15, further including a processor disposed on said food service cart which controls the level of heating by said heating element as a function of which of said two sensors detects a respective said indicator.

18. The meal delivery system of claim 15, wherein said lid includes indicia which indicates the level of heating of said pan for each of said different orientations of said lid.

19. A method for heating at one of two different heating levels food contained within a serving pan during storing and transporting thereof in a food service cart, the pan including integral therewith a first electrical connector and a heating element connected thereto, the method comprising the steps of:

covering the pan with a lid in one of two different orientations, the lid including an indicator located thereon such that the indicator is disposed relative to the pan in a first location when the lid is in a first one of the two different orientations, and the indicator is disposed relative to the pan in a second, different location when the lid is in a second one of the two different locations;

placing the pan within a food service cart at a pan support location, the food service cart including a second electrical connector adapted to mate with the first electrical connector when the pan is received therein for providing electrical power to the heating element of the pan;

detecting with a sensor disposed on the food service cart the presence of the indicator in the first one of the two different locations when the pan is received within the food service cart; and

supplying a first electrical current through the first and second electrical connectors to the heating element for heating of the food if the indicator is detected in the first one of the two different locations, and supplying a second, different electrical current through the first and second electrical connectors to the heating element for heating of the food if the indicator is not detected in the first one of the two different locations.

20. A method for heating at one of two different heating levels food contained within a serving pan during storing and transporting thereof in a food service cart, the pan including integral therewith a first electrical connector and a heating element connected thereto, the method comprising the steps of:

covering the pan with a lid in one of two different orientations, the lid including first and second indicators located thereon such that each indicator is disposed relative to the pan in a first location when the lid is in a first one of the two different orientations, and each indicator is disposed relative to the pan in a second, different location when the lid is in a second one of the two different locations;

placing the pan within a food service cart at a pan support location, the food service cart including a second electrical connector adapted to mate with the first electrical connector when the pan is received therein for providing electrical power to the heating element of the pan;

detecting with a sensor disposed on the food service cart the presence of the first indicator only in the first one of the respective two different locations;

detecting with a sensor disposed on the food service cart the presence of the second indicator only in the second one of the respective two different locations; and

supplying a first electrical current through the first and second electrical connectors to the heating element for heating of the food at a first heating level if the first indicator is detected in the first one of the respective two different locations, and supplying a second, different electrical current through the first and second electrical connectors to the heating element for heating of the food at a second heating level if the second indicator is detected in the second one of the respective two different locations.

21. The method of claim 20, wherein the lid is rectangular, the first indicator is located on the lid at one end thereof, the second indicator is located on the lid at the opposite end, and each indicator is offset from a longitudinal axis of the lid to the same side thereof.

22. The method of claim 20, wherein the first and second indicators each comprise a magnet.

23. The method of claim 20, wherein each sensor comprises a reed switch.

24. The method of claim 20, wherein the lid includes indicia thereon that identifies the heating level at which the food will be heated when the lid is disposed in an orientation thereof on the pan.

25. A meal delivery system for heating, storing and transporting of food contained within a serving pan, comprising:

a pan including integral therewith a first electrical connector and a heating element connected thereto for heating of food within said pan through conduction; and

a food service cart including a cart chassis and a molded station module mounted thereon having an inverted C-shaped cross-section adapted to slidably receive said pan therein for support thereof during storage and transportation, said station module including a second electrical connector attached thereto and adapted to mate with said first electrical connector when said pan is received therein for providing electrical power to said heating element for heating of food contained within said pan.

26. The meal delivery system of claim 25, wherein said station module is detachably mounted on said cart body.

27. The meal delivery system of claim 25, further including screws for mounting of said station module on said cart chassis.

28. The meal delivery system of claim 25, wherein said station module includes U-shaped sides that slidably engage a rim of said pan for support thereof.

29. The meal delivery system of claim 25, wherein said station module further includes a back wall to which said second electrical connector is mounted.

30. The meal delivery system of claim 28, wherein said back wall further includes an opening through which a fastener extends for mounting of said station module on said cart chassis.

31. The meal delivery system of claim 25, further comprising a plurality of pans and a corresponding plurality of station modules mounted on said food service cart in a vertically stacked configuration.

32. The meal delivery system of claim 31, wherein a bottom of a said pan received within a first said station module includes a downward protruding portion, and a second said station module mounted immediately below said first station module includes a top surface defining a shelf that engages and supports said bottom of said pan.

33. The meal delivery system of claim 32, wherein said top surface of said second station module includes a recess through which is received said downward protruding portion of said pan.

34. A meal delivery system for heating, storing and serving food, comprising:

a serving pan including integral therewith a first electrical connector and a heating element connected thereto for heating of food contained within said pan through conduction; and

a first serving platform adapted to receive said pan thereon for support thereof on a serving surface during serving of the food from within said pan, said serving platform including a second electrical connector attached thereto and adapted to mate with said first electrical connector when said pan is supported on said platform for providing electrical power to said heating element for the heating of the food.

35. The meal delivery system of claim 34, wherein said back rail comprises a substantially rectangular block having a cut away section for accommodating said second electrical connector mounted therein.

36. The meal delivery system of claim 34, wherein said serving platform is connected to a power source and further comprising two additional serving platforms electrically connected in series with said first serving platform.

37. The meal delivery system of claim 34, wherein said serving platform comprises a base, a front rail, a back rail, and side rails defining a receiving area for said pan, said back rail including said second electrical connector mounted thereon.

38. The meal delivery system of claim 35, said serving platform further including a front lip extending downwardly from said front rail, said front lip including a bottom edge extending below said base to an extent for engaging a side edge of the serving surface.

39. A serving pan for use in a meal delivery system for heating and storing of food, the system including a portable frame adapted to receive the pan for support thereof, said pan comprising:

walls and a bottom together defining a single, open-ended food containment area;

a first electrical connector disposed on one of said walls; and

a plurality of heating elements disposed in engagement with said pan bottom for heating of food within said containment area through conduction, each said heating element including its own temperature regulator, wherein said first electrical connector is adapted to mate with a second electrical connector disposed on the portable frame for providing electrical power to said plurality of heating elements.