Paul L Wellener

US Patent:

55160786, May 14, 1996

Filed:

Aug 16, 1994

Appl. No.:

8/291380

Inventors:

Paul L. Wellener - Pittsburgh PA
Alan F. Dunn - Houston PA
James R. Daniels - McDonald PA

Assignee:

Amcast Industrial Corporation - Washington PA

International Classification:

F16K 3100

US Classification:

2513352

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.