Patent US4126775A successfully refreshed from Google Patents.
US4126775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated food service system
Assignee: Aladdin Industries LLC
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Filing: 1977-07-01
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Granted: 1978-11-21
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Expires: 1997-07-01
Abstract
Abstract A food service system for institutional or other use is provided by a stack of insulated trays and a cart. In one embodiment the cart includes a heating and/or cooling source with an outlet and a return. The trays are provided with openings to permit the passage of heated or cooled air from the outlet through the stack to the return. In another embodiment the trays and cart are combined with a refrigeration unit and a heating unit to permit simultaneous heating and cooling of food portions held in the trays.
Inventors
- 👤 William B. Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:17
CPC Classifications
A; A47; A47B; A47B31/00; A47B31/02; A47J; A47J39/00; A47J39/006; A47B2031/026
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
A food service system comprising a base structure having an inlet and an outlet provided therein, means in said base structure for supplying air through said outlet, a stack of matched compartmented thermally insulated trays disposed on top of said base structure, a cover on top of said stack, one compartment in each tray positioned over a corresponding compartment in a tray below to form a column of compartments, said trays being provided with openings around said compartments, said openings being positioned relative to said inlet and said outlet whereby air may flow upwardly through some of said openings from said outlet and downwardly through other of said openings to said inlet.
Claim 2
Dependent Claim
112 words
A food service system comprising a base structure having an inlet and an outlet provided therein, means in said base structure for supplying air through said outlet, a stack of matched compartmented thermally insulated trays disposed on top of said base structure, a cover on top of said stack, one compartment in each tray positioned over a corresponding compartment in a tray below to form a column of compartments, said trays being provided with openings around said compartments, said openings being positioned relative to said inlet and said outlet whereby air may flow upwardly through some of said openings from said outlet and downwardly through other of said openings to said inlet.
Claim 3
Dependent Claim
30 words
A food service system as set forth in claim 1 wherein said cover is provided with a divider isolating said column of compartments from other compartments in said top tray.
Claim 4
Dependent Claim
31 words
A food service system as set forth in claim 2 wherein said means for supplying air comprises a blower in said base structure and a heating element mounted adjacent said outlet.
Claim 5
Dependent Claim
25 words
A food service system as set forth in claim 1 in combination with a cart and wherein said base structure is mounted in said cart.
Claim 6
Dependent Claim
25 words
A food service system as set forth in claim 1 in combination with a refrigerator and wherein said base structure is mounted in said refrigerator.
Claim 7
Dependent Claim
25 words
A food service system as set forth in claim 5 in combination with a cart and said stack of trays are carried on said cart.
Claim 8
Dependent Claim
39 words
A food service system as set forth in claim 6, including a ramp on each side of said base structure and wherein said cart is dimensioned to be moved up and down said ramp and over said base structure.
Claim 9
Dependent Claim
30 words
A food service system as set forth in claim 7 wherein said means for supplying air includes a blower in said base structure and a heating element adjacent said outlet.
Claim 10
Dependent Claim
37 words
A food service system as set forth in claim 8 wherein said cart is provided with a supporting surface having openings registering with the inlet and outlet in said base structure and the openings in said trays.
Claim 11
Dependent Claim
29 words
A food service system as set forth in claim 9 wherein each of said trays is provided with a passage on its bottom surface communicating with said tray openings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |