Patent US3373800A successfully refreshed from Google Patents.
US3373800A
Expired / Lapsed
US
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Control for heat pump
Assignee: Motors Liquidation Co
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Filing: 1966-09-22
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Granted: 1968-03-19
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Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Donald C Ferdelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:31
CPC Classifications
F; F25; F25B; F25B13/00; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/72; F24F11/74; F24F11/77; F24F11/80; F24F11/83; F24F11/84; F24F11/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A REVERSE CYCLE REFRIGERATING AND CONTROL SYSTEM INCLUDING INDOOR AND OUTDOOR HEAT TRANSFER UNITS, A MOTOR COMPRESSOR UNIT, A REVERSING VALVE FOR CHANGING THE REFRIGERANT CONNECTION BETWEEN THE MOTOR COMPRESSOR UNIT AND THE INDOOR AND OUTDOOR HEAT TRANSFER UNITS, FLOW CONTROL MEANS FOR CONTROLLING REFRIGERANT FLOW BETWEEN SAID INDOOR AND OUTDOOR HEAT TRANSFER UNITS, A DOUBLE THROW THERMOSTATIC SWITCH MEANS HAVING A MOVABLE CONTACT TERMINAL AND TWO NORMALLY STATIONARY CONTACT TERMINALS, A SOLENOID FOR OPERATING SAID REVERSING VALVE TO REVERSING POSITION, A SUPPLY CONDUCTOR CONNECTED TO THE MOVABLE CONTACT TERMINAL OF SAID THERMOSTATIC SWITCH, A SECOND SUPPLY CONDUCTOR CONNECTED TO SAID MOTOR COMPRESSOR UNIT, A FIRST SELECTOR SWITCH CONNECTING ONE OF THE STATION-
Claim 2
Dependent Claim
113 words
A REVERSE CYCLE REFRIGERATING AND CONTROL SYSTEM INCLUDING INDOOR AND OUTDOOR HEAT TRANSFER UNITS, A MOTOR COMPRESSOR UNIT, A REVERSING VALVE FOR CHANGING THE REFRIGERANT CONNECTION BETWEEN THE MOTOR COMPRESSOR UNIT AND THE INDOOR AND OUTDOOR HEAT TRANSFER UNITS, FLOW CONTROL MEANS FOR CONTROLLING REFRIGERANT FLOW BETWEEN SAID INDOOR AND OUTDOOR HEAT TRANSFER UNITS, A DOUBLE THROW THERMOSTATIC SWITCH MEANS HAVING A MOVABLE CONTACT TERMINAL AND TWO NORMALLY STATIONARY CONTACT TERMINALS, A SOLENOID FOR OPERATING SAID REVERSING VALVE TO REVERSING POSITION, A SUPPLY CONDUCTOR CONNECTED TO THE MOVABLE CONTACT TERMINAL OF SAID THERMOSTATIC SWITCH, A SECOND SUPPLY CONDUCTOR CONNECTED TO SAID MOTOR COMPRESSOR UNIT, A FIRST SELECTOR SWITCH CONNECTING ONE OF THE STATION-
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |