US3150501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pumps
Assignee: Westinghouse Electric Corp
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Filing: 1963-04-08
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Granted: 1964-09-29
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Paul B Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:51
CPC Classifications
F; F25; F25B; F25B13/00; F25B41/00; F25B41/30; F25B41/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
280 words
A HEAT PUMP COMPRISING A FINNED, INDOOR AIR COIL, A FINNED, OUTDOOR AIR COIL AND A CAPILLARY TUBE CONNECTED IN A CLOSED REFRIGERANT CIRCUIT, WITH SAID TUBE FORMING A TWOWAY MEANS FOR EXPANDING REFRIGERANT FROM EACH OF SAID COILS INTO THE OTHER OF SAID COILS, A REFRIGERANT REVERSAL VALVE IN SAID CIRCUIT FOR DIRECTING REFRIGERANT TO FLOW FROM SAID OUTDOOR COIL OPERATING AS A CONDENSER THROUGH SAID TUBE INTO SAID INDOOR COIL OPERATING AS AN EVAPORATOR FOR AIR COOLING, OR FROM SAID INDOOR COIL OPERATING AS A CONDENSER FOR AIR HEATING THROUGH SAID TUBE INTO SAID OUTDOOR COIL OPERATING AS AN EVAPORATOR, THE LENGTH AND INTERNAL DIAMETER OF SAID TUBE BEING SELECTED AND SAID CIRCUIT CONTAINING A CHARGE OF REFRIGERANT SELECTED FOR PROPER AIR COOLING OPERATION, A CONTROL VALVE CONNECTED IN SAID CIRCUIT BETWEEN SAID TUBE AND SAID INDOOR COIL AND CONTAINING MEANS OPERATED BY REFRIGERANT FLOW WHEN THE FLOW IS FROM SAID INDOOR COIL THROUGH SAID CONTROL VALVE AND SAID TUBE TO SAID OUTDOOR COIL FOR ADDING RESISTANCE TO REFRIGERANT FLOW, AND OPERATED BY REFRIGERANT FLOW WHEN THE FLOW IS FROM SAID OUTDOOR COIL THROUGH SAID TUBE AND CONTROL VALVE TO SAID INDOOR COIL FOR REMOVING SAID RESISTANCE, AND BARE TUBING HAVING A PORTION FORMED AS A COIL CONNECTED IN SAID CIRCUIT TO SAID CONTROL VALVE AND TO SAID INDOOR COIL, SAID BARE TUBING HAVING AN INTERNAL DIAMETER SUBSTANTIALLY LARGER THAN THAT OF SAID TUBE SO THAT IT OFFERS NEGLIGIBLE RESISTANCE TO REFRIGERANT FLOW, AND HAVING DIMENSIONS SUFFICIENT TO STORE THE EXCESS REFRIGERANT BACKED UP BY SAID CONTROL VALVE WHEN THE REFRIGERANT FLOW IS FROM SAID INDOOR COIL THROUGH SAID CONTROL VALVE AND CAPILLARY TUBE TO SAID OUTDOOR COIL.
Claim 2
Dependent Claim
280 words
A HEAT PUMP COMPRISING A FINNED, INDOOR AIR COIL, A FINNED, OUTDOOR AIR COIL AND A CAPILLARY TUBE CONNECTED IN A CLOSED REFRIGERANT CIRCUIT, WITH SAID TUBE FORMING A TWOWAY MEANS FOR EXPANDING REFRIGERANT FROM EACH OF SAID COILS INTO THE OTHER OF SAID COILS, A REFRIGERANT REVERSAL VALVE IN SAID CIRCUIT FOR DIRECTING REFRIGERANT TO FLOW FROM SAID OUTDOOR COIL OPERATING AS A CONDENSER THROUGH SAID TUBE INTO SAID INDOOR COIL OPERATING AS AN EVAPORATOR FOR AIR COOLING, OR FROM SAID INDOOR COIL OPERATING AS A CONDENSER FOR AIR HEATING THROUGH SAID TUBE INTO SAID OUTDOOR COIL OPERATING AS AN EVAPORATOR, THE LENGTH AND INTERNAL DIAMETER OF SAID TUBE BEING SELECTED AND SAID CIRCUIT CONTAINING A CHARGE OF REFRIGERANT SELECTED FOR PROPER AIR COOLING OPERATION, A CONTROL VALVE CONNECTED IN SAID CIRCUIT BETWEEN SAID TUBE AND SAID INDOOR COIL AND CONTAINING MEANS OPERATED BY REFRIGERANT FLOW WHEN THE FLOW IS FROM SAID INDOOR COIL THROUGH SAID CONTROL VALVE AND SAID TUBE TO SAID OUTDOOR COIL FOR ADDING RESISTANCE TO REFRIGERANT FLOW, AND OPERATED BY REFRIGERANT FLOW WHEN THE FLOW IS FROM SAID OUTDOOR COIL THROUGH SAID TUBE AND CONTROL VALVE TO SAID INDOOR COIL FOR REMOVING SAID RESISTANCE, AND BARE TUBING HAVING A PORTION FORMED AS A COIL CONNECTED IN SAID CIRCUIT TO SAID CONTROL VALVE AND TO SAID INDOOR COIL, SAID BARE TUBING HAVING AN INTERNAL DIAMETER SUBSTANTIALLY LARGER THAN THAT OF SAID TUBE SO THAT IT OFFERS NEGLIGIBLE RESISTANCE TO REFRIGERANT FLOW, AND HAVING DIMENSIONS SUFFICIENT TO STORE THE EXCESS REFRIGERANT BACKED UP BY SAID CONTROL VALVE WHEN THE REFRIGERANT FLOW IS FROM SAID INDOOR COIL THROUGH SAID CONTROL VALVE AND CAPILLARY TUBE TO SAID OUTDOOR COIL.
References Cited (Backward Citations)
US2785540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |