Diaphragm fluid pump

Details Diaphragm fluid pump Diaphragm fluid pump

1975-05-12

1976-12-28

Freeh, William L.

Pumps

Expansible chamber type

Biasing means effects eduction stroke of abutment driven,...

417566, 92 85R, 92129, F04B 4504, F01B 1102

Patent

active

039998991

ABSTRACT:
In a diaphragm fluid pump, a pump housing comprises a cylinder provided therein coaxially with an operating rod of a diaphragm piston assembly hermetically assembled within the housing, and a driving mechanism for the operating rod includes a piston element mounted on the free end of the operating rod and slidably engaged within the cylinder to regulate the axial movement of the operating rod, whereby the diaphragm piston assembly is reciprocated without twisting thereof.

REFERENCES:
patent: 2185784 (1940-01-01), Corydon
patent: 2293542 (1942-08-01), Hamilton
patent: 2529204 (1950-11-01), Van Ranst et al.
patent: 2653544 (1953-09-01), Katcher
patent: 2747789 (1956-05-01), Szerely
patent: 3025551 (1962-03-01), Oishei
patent: 3039127 (1962-06-01), Molenaal
patent: 3186349 (1965-06-01), Compton
patent: 3333547 (1967-08-01), Compton
patent: 3807281 (1974-04-01), Perkins

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