Variable capacity type vane pump with balancing groove in the ca

Details Variable capacity type vane pump with balancing groove in the ca Variable capacity type vane pump with balancing groove in the ca

1984-07-31

1985-12-17

Vrablik, John J.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 30, 418178, 418257, F04C 200, F04C 1504

Patent

active

045589984

ABSTRACT:
In a vane pump having a casing, an annular rotor rotatably disposed in the casing, a plurality of vanes longitudinally movably carried by the rotor, and a cam ring eccentrically disposed about the rotor with its cylindrical inner surface slidably contacting with the leading ends of the vanes, the cam ring having at the diametrically opposed portions thereof inlet and outlet ports which face in the same direction, there is proposed a measure in which a groove is formed in the cam ring near the inlet port and faces in the same direction as the inlet and outlet ports, and in which the groove is connected to the outlet port for balancing the cam ring.

REFERENCES:
patent: 1943929 (1934-01-01), Rayburn
patent: 2592247 (1952-04-01), Coe
patent: 2775946 (1957-01-01), Hufferd

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