Variable-displacement vane compressor with one or more ferromagn

Details Variable-displacement vane compressor with one or more ferromagn Variable-displacement vane compressor with one or more ferromagn

1983-06-03

1985-01-08

Vrablik, John J.

Rotary expansible chamber devices

With changeable working chamber magnitude

By adjustably limiting vane or abutment movement

418152, 418158, 418179, F04C 1800, F04C 2910

Patent

active

044925409

ABSTRACT:
A variable-displacement vane compressor has a pump housing and a cylindrical rotor supported on a drive shaft and rotatably disposed in the pump housing. The rotor has a plurality of vanes movably fitted in respective slits formed in the rotor and having radially outward ends slidable against an inner peripheral camming surface of the pump housing. Certain ones of the vanes are made of a ferromagnetic material and can be retracted back into the slits in response to energization of an electromagnetic coil to thereby reduce the volume of a fluid discharged from pump working chambers in the pump housing. When the electromagnetic coil is de-energized, all of the vanes are slidably held against the inner peripheral camming surface to discharge the compressed fluid in an increased volume.

REFERENCES:
patent: 4050263 (1977-09-01), Adalbert et al.
patent: 4132512 (1979-01-01), Roberts
patent: 4331223 (1982-05-01), Charlat et al.

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