Fluid-operated valve for pumps and the like

Details Fluid-operated valve for pumps and the like Fluid-operated valve for pumps and the like

1993-01-11

1994-01-04

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417564, 417566, 417571, 13751621, 13751623, 137854, 137860, F04B 2102, F04B 1300

Patent

active

052755410

ABSTRACT:
A diaphragm pump has a first fluid-operated valve which opens when the diaphragm performs a suction stroke and a second fluid-operated valve which opens when the diaphragm performs a compression stroke. The volumetric efficiency of the pump is enhanced by constructing at least one of its valves in such a way that the central portion of a resilient disc-shaped valving element, whose marginal portion bears against a seat when the valve is closed, abuts a supporting surface having a diameter selected in dependency on the diameter of the valving element, the thickness of the valving element and the Shore hardness of the material of the valving element in such a way that the selected frequency of the diaphragm in actual use of the pump induces a resonant frequency of the valving element. This also contributes to a reduction of noise and renders it possible to reduce wear upon the valving element and the adjacent parts of the respective valve.

REFERENCES:
patent: 1834590 (1931-12-01), Holdsworth
patent: 2264136 (1941-11-01), Karlberg
patent: 2407792 (1946-09-01), McMillan
patent: 2613870 (1952-10-01), Borgerd
patent: 3592302 (1971-07-01), Allinquant
patent: 3662541 (1972-05-01), Sawada et al.
patent: 3827539 (1974-08-01), Fader et al.
patent: 3900276 (1975-08-01), Dilworth
patent: 4172696 (1979-10-01), Gyory
patent: 4635849 (1987-01-01), Igashira et al.
patent: 4643139 (1987-02-01), Hargreaves
patent: 4701114 (1987-10-01), Andersen et al.
patent: 4936327 (1990-06-01), Baumann
patent: 4981421 (1991-01-01), Baumann

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