Diaphragm pump

Details Diaphragm pump Diaphragm pump

1975-03-20

1976-05-18

Freeh, William L.

Pumps

Motor driven

Fluid motor

417388, F04B 910

Patent

active

039573990

ABSTRACT:
A diaphragm pump apparatus is disclosed, having a mechanically reciprocated piston driving a hydraulic fluid chamber and reciprocating a flexible diaphragm. The apparatus includes a spring-biased expansion volume connected to the hydraulic fluid chamber and a hydraulic fluid replenishing port that opens on predetermined conditions of pressure loading and piston stroke position.

REFERENCES:
patent: 2301407 (1942-11-01), Houser et al.
patent: 2506235 (1950-05-01), Nicolls
patent: 2821926 (1958-02-01), Miller et al.
patent: 3277829 (1966-10-01), Borgert
patent: 3659969 (1972-05-01), Brituin
patent: 3680789 (1972-08-01), Wagner

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