Variable displacement vane pump adjustable by low actuation load

Details Variable displacement vane pump adjustable by low actuation load Variable displacement vane pump adjustable by low actuation load

1995-07-10

1999-01-26

Freay, Charles G.

Rotary expansible chamber devices

With changeable working chamber magnitude

418 23, F01C 116

Patent

active

058631895

ABSTRACT:
Variable-displacement, single-acting vane pumps in which the cylindrical cam member is adjustably supported within an outer annular cam housing to enable the cam member to be adjustably-rotated relative to the housing to adjust the geometric center of the cam chamber relative to the center of the rotor member and thereby adjust the displacement capacity of the pump between zero-flow maximum flow values. The annular housing for the cam member comprises a roller bearing assembly between its inner race surface and the cylindrical outer surface of the cam member, which minimizes the friction when the cam member is rotated during adjustment and enables the adjustment to be actuated remotely, such as by means of a small motor gear assembly.

REFERENCES:
patent: 2606503 (1952-08-01), Shaw
patent: 2880677 (1959-04-01), Grupen
patent: 4177024 (1979-12-01), Lohn
patent: 4764095 (1988-08-01), Fickelscher

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