Constant flow valve

Details Constant flow valve Constant flow valve

2003-12-25

2009-02-10

Hepperle, Stephen M (Department: 3753)

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

Reexamination Certificate

active

07487792

ABSTRACT:
A constant flow valve has a chamber (6) provided therein with a first diaphragm (8) having a valve member (7), a second diaphragm (9) and a third diaphragm (10). The chamber is divided into a first pressure chamber (11), a second valve chamber (12), a first valve chamber (13) and a second pressure chamber (18). The first pressure chamber has means for applying a constant inward force to the second diaphragm, and the second pressure chamber has means for applying a constant inward force to the third diaphragm. The first valve chamber is communicated with an inlet channel, the second valve chamber has a valve seat (27) corresponding to the valve member, and the valve seat divides the chamber into a bottom valve chamber (14) communicating with the first valve chamber through a communication hole formed in the first diaphragm and a top valve chamber (15) communicating with an outlet channel.

REFERENCES:
patent: 3215159 (1965-11-01), Nixon
patent: 5983926 (1999-11-01), Mastuzawa
patent: 2003/0116196 (2003-06-01), Sasao
patent: 47-3277 (1972-02-01), None
patent: 55-53829 (1980-12-01), None
patent: 04-160276 (1992-06-01), None
patent: 05-099354 (1993-04-01), None
patent: 26-00913 (1999-08-01), None
patent: 2001-004045 (2001-01-01), None

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