Pump with spring loaded valve

Details Pump with spring loaded valve Pump with spring loaded valve

1980-11-21

1984-12-04

Freeh, William L.

Pumps

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

Condition responsive fluid control

417298, 417510, 417515, F04B 4902, F04B 3908

Patent

active

044861524

ABSTRACT:
A hydraulic pump having spring loaded valves utilizes a spring providing a constant spring force and a spring providing a varying spring force. The varying spring force depending upon the position of the pump piston. The pump suction valve opens after a variable delay relative to the beginning of the piston suction phase when the pressure prevailing in the pump's dead chamber falls below a predetermined value. Abrupt decompression to the dead chamber is therefore avoided resulting in reduced energy consumption and noise level.

REFERENCES:
patent: 861213 (1907-07-01), Homersham
patent: 1316794 (1919-09-01), Holveck
patent: 1894869 (1933-01-01), Holveck
patent: 2001336 (1935-05-01), Vago et al.
patent: 2131857 (1938-10-01), Lauret
patent: 2504041 (1950-04-01), Orshansky, Jr.
patent: 2923251 (1960-02-01), De Lancy
patent: 3050005 (1962-08-01), Pschunder
patent: 3118390 (1964-01-01), Kinsley
patent: 3621759 (1970-02-01), Cousino
patent: 3981630 (1976-09-01), Le duc

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