Fluid supply system using one fluid medium to move a second flui

Details Fluid supply system using one fluid medium to move a second flui Fluid supply system using one fluid medium to move a second flui

1980-09-29

1983-06-14

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

91292, F04B 1700

Patent

active

043880495

ABSTRACT:
A fluid supply system includes a pump body having a main bore connectible through inlet check valves to draw secondary fluid from a first fluid reservoir and through outlet check valves to supply it to a secondary fluid 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 pressurized primary fluid 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 primary fluid source connections to the driving pistons.

REFERENCES:
patent: 2579670 (1951-12-01), Hjarpe
patent: 2942553 (1960-06-01), Moeller et al.
patent: 3016016 (1962-01-01), Horlacher

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