Fluid activated double diaphragm pump

Details Fluid activated double diaphragm pump Fluid activated double diaphragm pump

1992-12-31

1994-01-11

Gluck, Richard E.

Pumps

Motor driven

Fluid motor

13762537, F04B 4306

Patent

active

052775550

ABSTRACT:
An improved pilot valve construction for use in a fluid and mechanically actuated double diaphragm pump which includes a housing, first and second axially spaced fluid pressure chambers, first and second flexible diaphragms disposed in the pressure chambers and mechanically interconnected for simultaneous reciprocal movement and each defining a flexible wall of an adjacent pumping chamber and a pilot valve projecting axially into the pressure chambers and slidable axially in response to engagement by one of the diaphragms and wherein the pilot valve is provided with one or more axially extending grooves in its peripheral surface. The pilot valve may also be provided with a radially extending projection in its peripheral surface.

REFERENCES:
patent: 3791768 (1974-02-01), Wanner
patent: 4104008 (1978-08-01), Hoffmann et al.
patent: 4247264 (1981-01-01), Wilden
patent: 4478560 (1984-10-01), Rupp
patent: 4535821 (1985-08-01), Anderson
patent: 4548551 (1985-10-01), Ruttenberg et al.
patent: 4572238 (1986-02-01), Stenlund
patent: 4854832 (1989-08-01), Gardner et al.

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