Hydraulic pump with variable-stroke piston and generator using s

Details Hydraulic pump with variable-stroke piston and generator using s Hydraulic pump with variable-stroke piston and generator using s

1982-03-19

1984-07-24

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

Valve passage directly connecting concurrently contracting...

417299, 417364, F04B 4900

Patent

active

044616139

ABSTRACT:
The present invention relates to a double-acting hydraulic pump comprising a piston moving with a reciprocal rectilinear movement inside a cylinder of which each chamber is provided with a suction valve and a delivery valve, the rod of said piston being adapted to be driven by a variable-displacement driving member. The said piston rod extends beyond the piston and moves, outside the cylinder within a space of variable volume, provided in the body of the pump, which communicates, with a member controlling the by-pass device through which the two chambers of the cylinder communicate.

REFERENCES:
patent: 689272 (1901-12-01), Bailly
patent: 1001295 (1911-08-01), Moorhead
patent: 2387603 (1945-10-01), Negebauer
patent: 2667300 (1954-01-01), Huber
patent: 3012509 (1961-12-01), Mercier
patent: 3065703 (1962-11-01), Harman
patent: 3606591 (1971-09-01), Potma
patent: 4097198 (1978-06-01), Herron
patent: 4307999 (1981-12-01), Vanderlaan
patent: 4382748 (1983-05-01), Vanderlaan

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