Low pressure fluid supply system

Details Low pressure fluid supply system Low pressure fluid supply system

1980-09-26

1983-12-06

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

91291, F04B 1700

Patent

active

044190557

ABSTRACT:
A fluid supply system includes a pump body having a main bore connectible through inlet check valves to draw fluid from a fluid reservoir and through outlet check valves to supply low pressure fluid to a low pressure function upon reciprocation of a free piston in the main bore. The free piston includes a pair of coaxial driving pistons on either side which extend into main passages which are alternately connected to a high pressure source to cause reciprocation of the free piston. A first spool valve which responds to the completion of a free piston stroke activates a second spool valve which changes the high pressure source connections to the driving pistons.

REFERENCES:
patent: 2069123 (1937-01-01), Weaver
patent: 2579670 (1951-12-01), Hjarpe
patent: 2920640 (1960-01-01), Porter
patent: 3016016 (1962-01-01), Horlacher
patent: 3552269 (1971-01-01), Arndt

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