Variable displacement fluid pump

Details Variable displacement fluid pump Variable displacement fluid pump

1985-12-12

1987-01-06

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

92 121, F04B 106

Patent

active

046343490

ABSTRACT:
A variable displacement fluid pump comprises a rotor rotatably disposed within a housing, an eccentric ring movable close to and apart from the rotor to change a first eccentricity between a center of an inner periphery of the eccentric ring and a fixed center of rotation of the rotor so as to vary a displacement of the pump, and a plurality of pumping chambers each having a variable volume which changes sequentially to introduce thereinto fluid from an inlet port and to discharge therefrom fluid to a discharge port as the motor rotates. The rotor is so disposed that the fixed center of rotation of the rotor is spaced apart by a predetermined second eccentricity from a locus of the center of the inner periphery of the eccentric ring towards the discharge port.

REFERENCES:
patent: 2646755 (1953-07-01), Joy
patent: 3636819 (1972-01-01), Tobias

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