US4847722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator and microwave oven and overdemand interrupt circuit
Assignee: MICROFRIDGE Inc
•
Filing: 1987-09-17
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Granted: 1989-07-11
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Expires: 2007-09-17
Abstract
Abstract A microwave oven and a refrigerator are combined into a single cabinet housing a shared power supply with an electrical supply disconnect for the magnetron of the oven during a start-up power demand by the compressor of the refrigerator and for a period of time depending upon a rating of the compressor.
Inventors
- 👤 Robert P. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:11
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; H05B6/808; F; F25; F25D; F25D23/00; F25D23/12; H05B6/66
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
In a refrigerator having a compressor and a microwave having a magnetron combined in a single cabinet housing a power supply shared by said refrigerator and microwave oven, the improvement comprising: means for sensing an overtemperture condition within a food storage portion of said refrigerator; means for preventing electrical supply to said magnetron from said power supply through a closed input power switch upon said sensing and during only a compressor start-up power demand time interval wherein said time interval is set by a circuit according to a rating of said compressor and said time interval being substantially constant;
Claim 2
Dependent Claim
99 words
In a refrigerator having a compressor and a microwave having a magnetron combined in a single cabinet housing a power supply shared by said refrigerator and microwave oven, the improvement comprising: means for sensing an overtemperture condition within a food storage portion of said refrigerator; means for preventing electrical supply to said magnetron from said power supply through a closed input power switch upon said sensing and during only a compressor start-up power demand time interval wherein said time interval is set by a circuit according to a rating of said compressor and said time interval being substantially constant;
Claim 3
Dependent Claim
13 words
The improvement as in claim 1, wherein said circuit comprises an RC circuit.
Claim 4
Dependent Claim
27 words
The improvement as in claim 1, wherein said circuit comprises: an RC circuit means for controlling a relay according to a time constant of said RC circuit.
Claim 5
Dependent Claim
107 words
In a method of operating a refrigerator having a compressor and a microwave oven having a magnetron, said refrigerator and microwave being combined in a single cabinet housing a power supply shared by said refrigerator and microwave oven, the improvement comprising the steps of: sensing an overtemperature condition within a food storage portion of said refrigerator and upon said sensing; preventing electrical supply to said magnetron from said power supply through a closed input power switch during only a compressor start-up power demand time interval; said time interval being set by a circuit according to a rating of said compressor and said time interval being substantially constant.
Claim 6
Dependent Claim
107 words
In a method of operating a refrigerator having a compressor and a microwave oven having a magnetron, said refrigerator and microwave being combined in a single cabinet housing a power supply shared by said refrigerator and microwave oven, the improvement comprising the steps of: sensing an overtemperature condition within a food storage portion of said refrigerator and upon said sensing; preventing electrical supply to said magnetron from said power supply through a closed input power switch during only a compressor start-up power demand time interval; said time interval being set by a circuit according to a rating of said compressor and said time interval being substantially constant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |