US3564865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive air-conditioning system
Assignee: Motors Liquidation Co
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Filing: 1969-08-06
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Granted: 1971-02-23
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Expires: 1989-08-06
Abstract
Abstract IN PREFERRED FORM, AN AUTOMOTIVE AIR-CONDITIONING SYSTEM HAVING A COMPRESSOR, A CONDENSER, AN EXPANSION VALVE, AN EVAPORATOR AND A FLOW REGULATING THROTTLING VALVE SERIALLY CONNECTED TOGETHER, RESPECTIVELY, AND INCLUDING AN EQUALIZER LINE BETWEEN THE EXPANSION VALVE AND THE THROTTLING VALVE OUTLET. THE EQUALIZER LINE IS NORMALLY BLOCKED BY A THERMALLY ACTUATED VALVE WHICH OPENS WHEN THE COMPRESSOR TEMPERATURE EXCEEDS A PREDETERMINED MAXIMUM. THE OPENING OF THE EQUALIZER LINE TRANSMITS COMPRESSOR INLET PRESSURE TO THE EXPANSION VALVE WHICH OPENS IT TO ALLOW REFRIGERANT TO FLOW THROUGH THE EVAPORATOR AND INTO THE COMPRESSOR FOR COOLING PURPOSES.
Inventors
- 👤 Gary E Spencer
- 👤 Mervin R Butts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:34
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00485; F; F24; F24F; F24F5/00; F25; F25B; F25B31/00; F25B31/006; F25B41/00; F25B41/20; F25B41/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |