Patent US3275067A successfully refreshed from Google Patents.
US3275067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible heat pump system
Assignee: Individual
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Filing: 1963-11-05
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Granted: 1966-09-27
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Expires: 1983-11-05
Abstract
No abstract record available.
Inventors
- 👤 David H Sniader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:12
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A HEAT PUMP SYSTEM FOR SELECTIVELY HEATING AND COOLING A ROOM COMPRISING, IN COMBINATION, A REFRIGERANT COMPRESSOR, A REVERSE CYCLE VALVE, AN EVAPORATOR COIL FOR SELECTIVELY HEATING AND COOLING THE AIR WITHIN SAID ROOM AND A HEAT EXCHANGER CONNECTED IN OPERATIVE RELATION, SAID EXCHANGER INCLUDING A WATER MEDIUM COMMUNICATIVECHARGE MEANS, AND A WATER HEATING MEANS COMMUNICATIVELY CONNECTING A SOURCE OF COOLED WATER TO THE INLET SIDE OF THE WATER MEDIUM HEAT EXCHANGE MEANS FOR HEATING SAID WATER ONLY DURING OPERATION OF SAID SYSTEM FOR HEATING SAID ROOM, AND A SECONDARY COIL POSITIONED ADJACENT TO SAID EVAPORATOR COIL, SAID SECONDARY COIL HEATING INTERPOSED IN SERIES RELATION BETWEEN THE DISCHARGE SIDE OF SAID WATER HEATING MEANS AND THE SAID INLET SIDE OF SAID HEAT EXCHANGER WHEREBY SAID SECONDARY COIL IS HEATED BY SAID WATER HEATING MEANS ONLY DURING OPERATION OF SAID SYSTEM FOR HEATING SAID ROOM.
Claim 2
Dependent Claim
144 words
A HEAT PUMP SYSTEM FOR SELECTIVELY HEATING AND COOLING A ROOM COMPRISING, IN COMBINATION, A REFRIGERANT COMPRESSOR, A REVERSE CYCLE VALVE, AN EVAPORATOR COIL FOR SELECTIVELY HEATING AND COOLING THE AIR WITHIN SAID ROOM AND A HEAT EXCHANGER CONNECTED IN OPERATIVE RELATION, SAID EXCHANGER INCLUDING A WATER MEDIUM COMMUNICATIVECHARGE MEANS, AND A WATER HEATING MEANS COMMUNICATIVELY CONNECTING A SOURCE OF COOLED WATER TO THE INLET SIDE OF THE WATER MEDIUM HEAT EXCHANGE MEANS FOR HEATING SAID WATER ONLY DURING OPERATION OF SAID SYSTEM FOR HEATING SAID ROOM, AND A SECONDARY COIL POSITIONED ADJACENT TO SAID EVAPORATOR COIL, SAID SECONDARY COIL HEATING INTERPOSED IN SERIES RELATION BETWEEN THE DISCHARGE SIDE OF SAID WATER HEATING MEANS AND THE SAID INLET SIDE OF SAID HEAT EXCHANGER WHEREBY SAID SECONDARY COIL IS HEATED BY SAID WATER HEATING MEANS ONLY DURING OPERATION OF SAID SYSTEM FOR HEATING SAID ROOM.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |