Patent US3167114A successfully refreshed from Google Patents.
US3167114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump control
Assignee: Carrier Corp
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Filing: 1961-08-16
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Granted: 1965-01-26
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Expires: 1981-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard Houghton Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:41
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A METHOD FOR CONTROLLING THE OPERATION OF A HEAT PUMP INCLUDING A DRIVE MOTOR AND AUXILIARY HEATER, SAID METHOD COMPRISING THE STEPS OF: ENERGIZING THE HEAT PUMP DRIVE MOTORO IN RESPONSE TO A FIRST PREDETERMINED TEMPERATURE CONDITION IN THE AREA TO BE TREATED ENERGIZING THE AUXILIARY HEATER IN RESPONSE TO A PREDETERMINED TEMPERATURE CONDITION OF THE OUTDOOR AMBIENT; AND DEENERGIZING THE HEATER AND THE HEAT PUMP DRIVE MOTOR SEQUENTIALLY IN RESPONSE TO BOTH A SECOND PREDETERMINED TEMPERATURE CONDITION IN THE AREA TO BE TREATED AND A PREDETERMINED TIMED SEQUENCE, SAID DEENGERGIZING OF THE HEATER BEING PERFORMED BEFORE THE DEENERGIZING OF THE HEAT PUMP DRIVE MOTOR, WHEREBY THE HEAT PUMP DRIVE MOTOR WILL BE MAINTAINED IN OPERATION AT ALL TIMES THAT THE HEATER IS IN OPERATION.
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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |