Diaphragm pump

Details Diaphragm pump Diaphragm pump

1981-01-21

1983-07-12

Freeh, William L.

Pumps

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

417388, F04B 118, F04B 3502

Patent

active

043927874

ABSTRACT:
A diaphragm pump having a reciprocating piston, a rotatable cam canted and engaging the piston, and a diaphragm secured to a plunger stem by a screw rotatable relative to the stem. The plunger stem extends into a bore in the piston, the piston bore and plunger stem having a matching configuration preventing rotation of the plunger stem relative to the piston when the diaphragm securing screw is loosened. The piston end engaging the cam is formed as a spherical section positioning the line of engagement with the cam closely adjacent the axial center of the piston, to reduce side thrust.

REFERENCES:
patent: Re29055 (1976-11-01), Wagner
patent: 1238939 (1917-09-01), Pfeeger
patent: 2424943 (1947-07-01), Nicolls
patent: 2582157 (1952-01-01), Pica
patent: 3068798 (1962-12-01), Machen
patent: 3374750 (1968-03-01), Hetz
patent: 3476053 (1969-11-01), Czarnecki et al.
patent: 3680981 (1972-08-01), Wagner
patent: 3712758 (1973-01-01), Lech
patent: 3775030 (1973-11-01), Wanner
patent: 3884598 (1975-05-01), Wanner
patent: 4068982 (1978-01-01), Quarve

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