Variable displacement pump

Details Variable displacement pump Variable displacement pump

1993-12-28

1996-07-23

Korytnyk, Peter

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

418 26, F04B 4900

Patent

active

055384005

ABSTRACT:
A variable capacity or displacement type pump by which a pump discharge quantity is variably controlled in accordance with the revolution number, which has simple construction to contributes easier machining and assembling, and is reliable in operation. A cam ring is movably arranged to define a pump chamber around a rotatable rotor within a pump body and is biased so that the volume of the pump chamber is made maximum. Sealing members are provided in an annular space between the cam ring and the pump body so as to define first and second hydraulic pressure chambers through which the cam ring is driven to move. A switch valve is provided to control the hydraulic pressure transmitted to the first and second chambers in accordance with the quantity of the flow discharged from the pump chamber.

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