Unloading means for a gas compressor

Details Unloading means for a gas compressor Unloading means for a gas compressor

1979-05-07

1981-06-02

Freeh, William L.

Pumps

With condition responsive pumped fluid control

417295, 417299, 417307, 417308, 417310, F04B 4900

Patent

active

042708850

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.

REFERENCES:
patent: 1352751 (1920-09-01), Jackson
patent: 2235251 (1941-03-01), Boldt
patent: 2722395 (1955-11-01), Boyce
patent: 3406897 (1968-10-01), Diels
patent: 3447496 (1969-06-01), Short
patent: 3759636 (1973-09-01), Schaefer et al.

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