Unloading means for a gas compressor
US4270885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C28/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In the embodiment shown, the invention comprises a suction/check valve interposed in a gas inlet channel, the channel being open at one end for communication with the atmosphere, and at the opposite end for communication with a gas compressor inlet port. The valve has a bleed hole formed therein for slowly blowing down the compressor receiver at shutdown. A second check valve is operatively interposed between the receiver and the atmosphere for depressurizing the receiver when the compressor unloads. A conduit which communicates with both valves provides a valve-operating, fluid, pilot-pressure to close off the suction/check valve, and to interdict its bleed hole, and to open the second check valve, with compressor unloading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.