Hydraulically powered diaphragm pump with pretensioned...

Details Hydraulically powered diaphragm pump with pretensioned... Hydraulically powered diaphragm pump with pretensioned...

2005-04-26

2005-04-26

Tyler, Cheryl J. (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S413100, C417S470000, C417S570000, C092S135000

Reexamination Certificate

active

06884045

ABSTRACT:
A hydraulically driven diaphragm pump with a diaphragm clamped at its edge between a pump body and a pump cover separating a delivery chamber from a hydraulic chamber and pretensioned in the direction of its intake stroke by spring force. A hydraulic diaphragm drive in the form of an oscillating displacement piston is displaceable in the pump body between a reservoir chamber for the hydraulic fluid and the hydraulic chamber. The diaphragm is so strongly pretensioned by spring force that it exerts a substantial compressive force on the hydraulic fluid in the hydraulic chamber. Therefore a substantial hydrostatic pressure is built up in the hydraulic chamber relative to the delivery chamber.

REFERENCES:
patent: 2546302 (1951-05-01), Gehres et al.
patent: 2642090 (1953-06-01), Barr
patent: 2653552 (1953-09-01), Geeraert
patent: 3075468 (1963-01-01), Eifel
patent: 3386388 (1968-06-01), Rosenberg
patent: 4022114 (1977-05-01), Hansen, III et al.
patent: 1 034 030 (1958-07-01), None
patent: 25 26 925 (1976-09-01), None
patent: 403014930 (1991-01-01), None

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