US3303664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system having a back pressure valve
Assignee: Refrigerating Specialties Co
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Filing: 1965-04-30
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Granted: 1967-02-14
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Charles C Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:37
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/10; F25B41/00; F25B41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A REFRIGERATION SYSTEM HAVING SERIALLY CONNECTED CONDENSER, EXPANSION VALVE AND EVAPORATOR, AND SERIALLY CONNECTED THEREWITH A REFRIGERANT FLOW CONTROL VALVE, AND A COMPRESSOR PROVIDING HIGH AND LOW REFRIGERANT PRESSURES, SAID FLOW CONTROL VALVE, A PRESSURE RESPONSIVE ELEMENT FOR OPENING SAID VALVE AND HAVING A BLEED ORIFICE BYPASSING SAID PRESSURE RESPONSIVE ELEMENT, A COMPENSATING REGULATOR MEANS INCLUDING A VALVE MEMBER, RESILIENT MEANS URGING THE VALVE MEMBER TO ITS OPEN POSITION AND A MEMBER RESPONSIVE TO REFRIGERANT PRESSURE UPON ONE SIDE THEREOF FOR URGING THE VALVE MEMBER TO ITS OPEN POSITION AND UPON ITS OTHER SIDE TO REFRIGERANT PRESSURE FOR URGING CLOSURE OF THE VALVE MEMBER, SAID OTHER SIDE OF THE PRESSURE RESPONSIVE MEMBER BEING IN COMMUNICATION WITH ONE SIDE OF THE VALVE MEMBER,
Claim 2
Dependent Claim
123 words
IN A REFRIGERATION SYSTEM HAVING SERIALLY CONNECTED CONDENSER, EXPANSION VALVE AND EVAPORATOR, AND SERIALLY CONNECTED THEREWITH A REFRIGERANT FLOW CONTROL VALVE, AND A COMPRESSOR PROVIDING HIGH AND LOW REFRIGERANT PRESSURES, SAID FLOW CONTROL VALVE, A PRESSURE RESPONSIVE ELEMENT FOR OPENING SAID VALVE AND HAVING A BLEED ORIFICE BYPASSING SAID PRESSURE RESPONSIVE ELEMENT, A COMPENSATING REGULATOR MEANS INCLUDING A VALVE MEMBER, RESILIENT MEANS URGING THE VALVE MEMBER TO ITS OPEN POSITION AND A MEMBER RESPONSIVE TO REFRIGERANT PRESSURE UPON ONE SIDE THEREOF FOR URGING THE VALVE MEMBER TO ITS OPEN POSITION AND UPON ITS OTHER SIDE TO REFRIGERANT PRESSURE FOR URGING CLOSURE OF THE VALVE MEMBER, SAID OTHER SIDE OF THE PRESSURE RESPONSIVE MEMBER BEING IN COMMUNICATION WITH ONE SIDE OF THE VALVE MEMBER,
References Cited (Backward Citations)
US3242688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |