Packless valve apparatus

Details Packless valve apparatus Packless valve apparatus

2006-02-14

2006-02-14

Look, Edward K. (Department: 3751)

Valves and valve actuation

Reciprocating valve

Diaphragm

Reexamination Certificate

active

06997440

ABSTRACT:
The valve includes a dome shaped diaphragm clamped between a base and valve body with the base having an inlet and an outlet opening to the diaphragm and a plastic button having a concave central portion surrounded by an annular convex portion for abutting against the diaphragm to move it to a closed position against a valve seat to block fluid flow between the inlet and an outlet. In a valve open position, the button central portion abuts against the diaphragm central portion while, as the button moves to a valve closed position, the closing force is applied to the diaphragm further radial outwardly. An actuator is operable for moving a plunger against a larger diameter insert mounted in a button recess which is axially opposite the diaphragm.

REFERENCES:
patent: 237854 (1881-02-01), Garsed
patent: 2283369 (1942-05-01), Jacobsen
patent: 4606374 (1986-08-01), Kolenc et al.
patent: 4684106 (1987-08-01), Kolenc et al.
patent: 5295662 (1994-03-01), Yamaji et al.
patent: 5485984 (1996-01-01), Itoi et al.
patent: 6092550 (2000-07-01), Gotch et al.
patent: 6341758 (2002-01-01), Shih et al.

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