Variable displacement vane pump having floating ring seal

Details Variable displacement vane pump having floating ring seal Variable displacement vane pump having floating ring seal

1995-04-25

1996-08-13

Freay, Charles

Rotary expansible chamber devices

With changeable working chamber magnitude

By cylinder or cylinder portion pivotal movement

418104, F01C 2116

Patent

active

055450180

ABSTRACT:
A pump comprising a durable rotor member having large diameter journal ends at each side of a central vane section comprising vane slots having well areas which slidably-engage a mating vane element. The present vane pumps comprise novel cylindrical floating ring seal elements having a support body which continuously seals the face of the cam member, and have a movable inner ring assembly which becomes pressure-loaded against the rotor journals during use, to minimize or limit axial pressure leakage while balancing or minimizing bearing load.

REFERENCES:
patent: 3549281 (1970-12-01), Schink et al.
patent: 4678412 (1987-07-01), Dautlgraber
patent: 4950137 (1990-08-01), Fischer et al.

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