Variable displacement pump

Details Variable displacement pump Variable displacement pump

1980-01-07

1982-08-03

Vrablik, John J.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 27, 418 30, F04C 1502, F04C 2908

Patent

active

043425453

ABSTRACT:
A variable displacement vane type pump having a pivotally mounted ring member controllable to vary the eccentricity between the rotor and the ring thus controlling the pump displacement. The ring is positioned on the pivot such that the center thereof is always located in one quadrant relative to axes through the pivot point and the center of the pump rotor to continually maintain the net ring reaction force, due to internal pressure, directed to one side of the pivot connection in opposition to the displacement control pressure, which is impressed on a portion of the outer surface of the ring, whereby control stability throughout the displacement range is improved.

REFERENCES:
patent: 2433484 (1947-12-01), Roth
patent: 2635551 (1953-04-01), De Lancey
patent: 2811926 (1957-11-01), Robinson, Jr.
patent: 3656869 (1972-04-01), Leonard

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