Variable capacity type vane pump with a variable restriction ori

Details Variable capacity type vane pump with a variable restriction ori Variable capacity type vane pump with a variable restriction ori

1991-07-24

1992-08-25

Bertsch, Richard A.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 30, 418268, 417310, F04C 1502

Patent

active

051414180

ABSTRACT:
A variable capacity type vane pump comprising a cam ring, a rotor placed for rotation within the cam ring. The rotor has a number of radial slots, and vances placed for radial inward and outward movement in the receptive slots each having a bottom. A pump chamber is defined between the cam ring and the rotor and it has an inlet and outlet port. The outlet port is connected through a conduit to the bottom of at least one of the slots having vanes moving inwardly in the respective slots. A restriction orifice is placed in the conduit. The cam ring is moved with respect to the rotor to vary the capacity of the vane pump in response to a pressure differential across the restriction orifice.

REFERENCES:
patent: 3756749 (1973-09-01), Aldinger
patent: 4557670 (1985-12-01), Inagaki et al.
patent: 4722652 (1988-02-01), Jingin et al.
patent: 4737078 (1988-04-01), Dantloraber
patent: 4927332 (1990-05-01), Fisher et al.

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