Pressure equalizing means for compressors and the like
Abstract
Abstract A PRESSURE EQUALIZING DEVICE FOR A COMPRESSOR WHEREIN A VALVE CONTROLLED PASSAGE BETWEEN A HIGH PRESSURE CHAMBER AND A SUCTION CHAMBER OF THE COMPRESSOR IS PROVIDED FOR EQUALIZING THE PRESSURE IN THE SUCTION CHAMBER AND THE HIGH PRESSURE CHAMBER DURING START-UP OF THE COMPRESSOR. THE COMPRESSOR COMPRISES A ROTARY COMPRESSOR HAVING A ROTOR DISPOSED IN THE COMPRESSION CHAMBER FOR COMPRESSING FLUID SUCH AS REFRIGERANT FLUID WHICH IS PRECOOLED AND THEN DELIVERED TO THE HIGH PRESSURE CHAMBER FOR DELIVERY TO ASSOCIATED APPARATUS SUCH AS REFRIGERATION APPARATUS. THE FLUID IS RETURNED TO THE SUCTION CHAMBER OF THE COMPRESSOR THROUGH A RETURN INLET WHICH IS PROVIDED WITH A CHECK VALVE FOR PREVENTING REVERSE FLOW FROM THE SUCTION CHAMBER.
Inventors
- 👤 Bert W Romerhaus
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |