Diaphragm pumps

Details Diaphragm pumps Diaphragm pumps

1983-06-30

1985-09-10

Freeh, William L.

Pumps

Three or more cylinders arranged in parallel, radial, or...

Radial cylinders

417383, F04B 3502

Patent

active

045403465

ABSTRACT:
A diaphragm pump is disclosed which includes flow channels (12;12a) within pressure chambers (9;9a), at least one of the walls defining the flow channels being in the form of a diaphragm wall (16,17; 16a,17a). A driven piston (A;B) displaces a liquid within the pressure chambers (9;9a) to cause cyclical changes in the volume of and pressure subsisting within the flow channels. Compensating pistons (S;T) are disposed generally opposite each of the driven pistons (A;B) and the compensating pistons are connected to a common hydraulic circuit such that the compensating pistons remain in position until the pressure in one of the pressure chambers (9;9a) exceeds a predetermined pressure, whereupon the compensating pistons (S;T) react in a manner tending to prevent further rise in the pressure in that chamber.

REFERENCES:
patent: 2624284 (1953-01-01), Straub
patent: 2711697 (1955-06-01), Gibbs
patent: 3000320 (1961-09-01), Ring
patent: 3030892 (1962-04-01), Riccardo
patent: 3134508 (1964-05-01), Bayer et al.
patent: 3168045 (1965-02-01), Seabastiani
patent: 3257952 (1966-06-01), McCormick
patent: 3508845 (1970-04-01), Strassburger
patent: 4443160 (1984-04-01), Berthold

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