Fluid driven reciprocating pump capable of either single-action

Pumps – Motor driven – Fluid motor

Patent

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91309, F04B 910

Patent

active

045485518

ABSTRACT:
A fluid-driven reciprocating pump comprises a pair of pumping heads each containing a displaceable member defining a driving chamber and a pumping chamber, a mechanical connection coupling the two displaceable members for reciprocation together, and means for connecting the driving chamber of one pumping head to a source of pressurized fluid and the pumping chamber of that pumping head to a source of material to be pumped. The pump further includes means for connecting the driving chamber of the other pumping head to a source of pressurized fluid and for selectively connecting the pumping chamber of the other pumping head either to a source of material to be pumped to produce a double-action pumping operation wherein the material is pumped during both reciprocations of the displaceable members, or to the source of pressurized fluid to produce a single-action pumping operation wherein the material is pumped during only one of the two reciprocations of the displaceable members.

REFERENCES:
patent: 1935792 (1933-11-01), Farmer
patent: 2236665 (1941-04-01), Beers
patent: 3162093 (1964-12-01), Zoller
patent: 3838946 (1974-10-01), Schall
patent: 4021149 (1977-05-01), Rutenberg et al.

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