Check valve for fluid delivery system

Details Check valve for fluid delivery system Check valve for fluid delivery system

1990-12-21

1992-03-17

Hepperle, Stephen M.

Fluid handling

Diverse fluid containing pressure systems

Main line flow displaces additive from shunt reservoir

137510, 137544, F16K 717

Patent

active

050959328

ABSTRACT:
A check valve for use in a fluid delivery system is provided to deliver precise volumes of a plurality of fluids in sequence to a treatment reservoir. The check valve is in fluid communication with a positive displacement pump and with fluid reservoir. The check valve includes a housing for securing check valve elements adjacent a plate having an inlet and an outlet. The check valve includes a diaphragm positioned to seal or to open fluid communication between a check valve inlet and a check valve outlet. A fluid by-pass is provided for passage of a pressurizing fluid around the check valve into the fluid reservoir.

REFERENCES:
patent: 3119404 (1964-01-01), Lawrence
patent: 3384103 (1968-05-01), Lansky
patent: 3496874 (1970-02-01), Findlay
patent: 4559963 (1985-12-01), Sugisawa et al.
patent: 4635848 (1987-01-01), Little
patent: 4718467 (1988-01-01), DiGianfilippo et al.
patent: 4768547 (1988-09-01), Danby et al.

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