Variable capacity vane compressor capable of controlling back pr

Details Variable capacity vane compressor capable of controlling back pr Variable capacity vane compressor capable of controlling back pr

1984-03-30

1985-05-14

Smith, Leonard E.

Rotary expansible chamber devices

With changeable working chamber magnitude

By adjustably limiting vane or abutment movement

418268, F01C 2116

Patent

active

045169209

ABSTRACT:
The communication between at least one of the pump inlets opening in at least two housing cavities and the suction chamber can be interrupted by a first valve means for prohibiting fluid compression in at least one of the housing cavities associated with the at least one pump inlet. At least one of the front and rear side blocks is formed with at least two passage means at locations corresponding to different ones of the cavities for introducing compressed fluid into back pressure chambers formed in the rotor. The communication between at least one of the passage means and the suction chamber can be interrupted by a second valve means. A control means actuates the second valve means so as to interrupt the communication between the at least one passage means and the suction chamber at the same time of establishment of the communication between the at least one pump inlet and the suction chamber, to thereby reduce the back pressure acting upon vanes moving in the above at least one housing cavity while the fluid compression in the same housing cavity is prohibited.

REFERENCES:
patent: 3828569 (1974-08-01), Weisgerber
patent: 4260343 (1981-04-01), Watanabe

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