Patent US4471193A successfully refreshed from Google Patents.
US4471193A
Expired / Lapsed
US
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Microwave heating apparatus with plural temperature sensors
Assignee: Baxter International Inc
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Filing: 1981-01-19
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Granted: 1984-09-11
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Expires: 2001-01-19
Abstract
Abstract Disclosed is a microwave oven for selectively quickly and safely raising the temperature of a plurality of distinct articles. Basic structural elements are a housing that defines an oven chamber, a door providing access thereto and an energy source for transmitting microwave energy into the chamber. Located within the chamber is a support assembly that defines a plurality of heating stations, each adapted to receive a distinct article to be heated. A temperature sensor is disposed in each of the stations so as to sense the temperture of an article retained therein. Coupled between the microwave source and the temperature sensors is a control circuit that automatically deenergizes the microwave source in response to the sensing of a temperature above a predetermined threshold by any of the individual sensors.
Inventors
- 👤 Carl W. Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:02
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/68; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
Oven apparatus comprising: housing means defining an oven chamber; door means providing access to said chamber; source means energizable to transmit microwave energy into said chamber; support means located within said chamber and defining an identifiable control station and a plurality of other stations, each adapted to receive a distinct article to be heated; a control temperature sensor positioned in said control station and a safety temperature sensor positioned in each of said other stations, each of said sensors adapted to sense the temperature of an article retained in its station; and a control circuit coupled to said source means and said sensors, said control circuit adapted to automatically deenergize said source means in response to the sensing of a temperature above a given threshold by said control sensor or the sensing by any of said safety sensors of a temperature substantially above a threshold different than said given threshold.
Claim 2
Dependent Claim
150 words
Oven apparatus comprising: housing means defining an oven chamber; door means providing access to said chamber; source means energizable to transmit microwave energy into said chamber; support means located within said chamber and defining an identifiable control station and a plurality of other stations, each adapted to receive a distinct article to be heated; a control temperature sensor positioned in said control station and a safety temperature sensor positioned in each of said other stations, each of said sensors adapted to sense the temperature of an article retained in its station; and a control circuit coupled to said source means and said sensors, said control circuit adapted to automatically deenergize said source means in response to the sensing of a temperature above a given threshold by said control sensor or the sensing by any of said safety sensors of a temperature substantially above a threshold different than said given threshold.
Claim 3
Dependent Claim
15 words
Apparatus according to claim 1 wherein said different threshold is greater than said given threshold.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2 wherein said control circuit comprises alarm means energized in response to the sensing of a temperature above said different threshold by any of said safety sensors.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 3 wherein each of said sensors comprises a thermistor.
Claim 6
Dependent Claim
30 words
Apparatus according to claim 1 wherein said support means comprises a turntable adapted to allow movement of said stations, and including drive means energizable to produce movement of said turntable.
Claim 7
Dependent Claim
15 words
Apparatus according to claim 5 wherein said different threshold is greater than said given threshold.
Claim 8
Dependent Claim
31 words
Apparatus according to claim 6 wherein said control circuit comprises alarm means energized in response to the sensing of a temperature above said different threshold by any of said safety sensors.
Claim 9
Dependent Claim
13 words
Apparatus according to claim 7 wherein each of said sensors comprises a thermistor.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |