Compressor unloader and check valve unit
Abstract
Abstract A COMPRESSOR UNLOADER AND CHECK VALVE UNIT COMPRISING A VALVE BODY HAVING A PRESSURE INLET PORT FOR CONNECTION THERETO OF A LINE FROM A COMPRESSOR, A PRESSURE OUTLET PORT FOR CONNECTION THERETO OF A LINE TO AN ACCUMULATOR, AND AN EXHAUST VENT PORT. A VENT PORT VALVE MEMBER IS PROVIDED IN THE BODY, THIS VALVE MEMBER BEING BIASED TOWARD A CLOSED POSITION FOR BLOCKING COMMUNICATION BETWEEN THE INLET PORT AND THE VENT PORT, AND BEING OPENED VIA A PISTON IN THE BODY UNDER CONTROL OF A PILOT VALVE IN RESPONSE TO INCREASE OF PRESSURE IN THE OUTLET PORT. A CHECK VALVE IS PROVIDED IN THE BODY WHICH IS BIASED TOWARD A CLOSED POSITION FOR BLOCKING COMMUNICATION BETWEEN THE INLET AND OUTLET PORTS.
Inventors
- 👤 Joseph L Krechel
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |