Hydraulic pump with pistons and controlled suction valves

Details Hydraulic pump with pistons and controlled suction valves Hydraulic pump with pistons and controlled suction valves

1984-11-29

1986-12-16

Freeh, William L.

Pumps

Three or more cylinders arranged in parallel, radial, or...

Condition responsive fluid control

417510, 417515, 13762413, F04B 126, F04B 118, F04B 3908

Patent

active

046294007

ABSTRACT:
A hydraulic pump comprising at least a reciprocating piston, each piston being associated with one suction valve returned to its closing position by a return spring. The return spring is associated on the one hand with the valve and on the other hand with a push-piece cyclically actuated by a cam driven by the pump driving shaft in such manner that the action of the spring on the suction valve is cancelled during the suction phase and reestablished at the end of the suction phase.

REFERENCES:
patent: 744916 (1903-11-01), Holdworth
patent: 861213 (1907-07-01), Homersham
patent: 2001336 (1935-05-01), Vago et al.
patent: 2131749 (1938-10-01), Ofoldt
patent: 2131857 (1938-10-01), Lauret
patent: 2997956 (1961-08-01), Stewart
patent: 4236881 (1980-12-01), Pfloger

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