Vane compressor with means for obtaining sufficient back pressur

Details Vane compressor with means for obtaining sufficient back pressur Vane compressor with means for obtaining sufficient back pressur

1990-03-08

1992-03-17

Nilson, Robert G.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

F04C 2906

Patent

active

050963872

ABSTRACT:
A vane compressor includes a cylinder having a pair of side blocks. A communication passage is formed through at least one of the side blocks. The communication passage has one end thereof opening into a discharge pressure chamber, and another end thereof opening in a rotor side end face of the at least one of the side blocks at a location corresponding to the orbital path of an end of a back pressure chamber defined in each of vane slits having a vane slidably fitted therein. The communication passage is provided therein with a valve which opens the communication passage when the difference between pressure in the discharge pressure chamber and pressure in the back pressure chamber is below a predetermined value, and closes same when the difference in pressure is above the predetermined valve.

REFERENCES:
patent: 4743183 (1988-05-01), Irie
patent: 4743184 (1988-05-01), Sumikawa
patent: 4778352 (1988-10-01), Nakajima

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