Gas cylinder valve with non-perforated diaphragms

Details Gas cylinder valve with non-perforated diaphragms Gas cylinder valve with non-perforated diaphragms

1994-08-16

1996-05-14

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Diaphragm

251266, F16K 3100

Patent

active

055160786

ABSTRACT:
A gas cylinder valve with minimum wetted area has a one-piece valving assembly comprising a valve member, a non-perforated diaphragm member and a valve stem, the latter including a threaded stud and a stem shaft threaded on to the stud. The threaded stud, diaphragm member and valve member are fused together by a YAG laser weld applied through a central, blind bore in the valve member. Another through weld is applied around the peripheral edge of the threaded stud. A rim on the stem shaft clamps the diaphragm outside the peripheral weld through a pair of washers which absorb the torsional load. A helical compression spring bears on a valve stem shaft shoulder outside the wetted area to bias the valve open. A resilient bushing supported by a metal cup backs up the diaphragm member.

REFERENCES:
patent: 2061028 (1936-11-01), Forbes et al.
patent: 3979105 (1976-09-01), Pool et al.
patent: 4231549 (1980-11-01), Visalli
patent: 4671490 (1987-06-01), Kolene et al.
patent: 4706929 (1987-11-01), Kalaskie et al.
patent: 4750709 (1988-06-01), Kolene et al.
patent: 4776562 (1988-10-01), Kalaskie et al.
patent: 4828219 (1989-04-01), Ohmi et al.
patent: 5037066 (1991-08-01), Kerger et al.
Ceodeux, Robinetterie The Valvemakers, Operating Instructions for High Pressure Gas Cylinder Diaphragm Valve; Dated Apr. 2, 1991; pp. 1-6.

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