Fluid driven pump with one-way valve in fluid inlet

Details Fluid driven pump with one-way valve in fluid inlet Fluid driven pump with one-way valve in fluid inlet

1983-10-07

1985-11-05

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

123 73AD, 123DIG5, 91446, F02B 3306

Patent

active

045510768

ABSTRACT:
A fluid driven pump comprising a pump housing defining a recess including therein a moveable wall which divides said recess into a variable volume driving chamber and a variable volume pumping chamber. The pump also includes a pressure inlet communicable with the driving chamber and adapted to communicate with a source of pressure which oscillates between an operating pressure and a pressure different from the operating pressure. The pressure inlet includes a one-way valve for permitting fluid under the operating pressure to communicate with the driving chamber to move the moveable wall in one direction when the driving chamber is in communication with the pressure inlet. The pump also includes a vent communicable with the driving chamber and adapted to communicate with a source of pressure different from said operating pressure, a spring for moving the moveable wall in the opposite direction when the driving chamber is in communication with the vent, and a shuttle valvearrangement for selectively controlling communication of the driving chamber with the pressure inlet and the vent. In another embodiment, the vent is adapted to be in communication with the oscillating pressure source and the spring is replaced with a one-way valve in the vent for permitting fluid under the pressure different from the operating pressure to communicate with the driving chamber.

REFERENCES:
patent: 2298106 (1942-10-01), Carlson
patent: 2804055 (1957-08-01), Hill et al.
patent: 2951745 (1958-03-01), Sweet et al.
patent: 3386388 (1968-06-01), Rosenberg
patent: 3653784 (1972-04-01), Leiterman et al.
patent: 3765802 (1973-10-01), Letterman et al.

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