Piston diaphragm pump

Details Piston diaphragm pump Piston diaphragm pump

1982-05-12

1984-08-14

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417395, F04B 908, F04B 4306

Patent

active

044654383

ABSTRACT:
A piston diaphragm pump includes a support plate, disposed on the side of the piston work chamber, for the diaphragm, which is held in a freely movable manner counter to the pressure of a plurality of springs engaging its circumference. A control push rod under the pressure of another spring, counter to the support plate, engage the circumferential area of the support plate and has a conical recess on its circumference, along which slides a displaceable locking member for a refill valve for the hydraulic fluid during the movement of the control push rod. The refill valve opens only when the support plate displaces the control push rod counter to the pressure of its spring as a consequence of a lack of hydraulic fluid in the pump.

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