Patent Number: 8,714,178

Title: Valve stem connection structure of pressure reducing valve and method therefor

Abstract: In a valve stem connection structure of a pressure reducing valve, an insertion recess portion (72) opened toward a valve mechanism is coaxially provided in a diaphragm rod (68); a reduced diameter stem portion (30a) and a pair of enlarged diameter stem portions (30b, 30c) are provided in one end portion of the valve stem (30); a holding plate (74) is inserted into the insertion recess portion (72) while the reduced diameter stem portion (30a) is loosely inserted into the engaging recess portion (73); and an engaging ring (78) expandable and contractable in a radial direction of the valve stem (30) is engaged with an arc-shaped first engaging groove (76) provided in an outer periphery of the holding plate (74) and an annular second engaging groove (77) provided in an inner periphery of the insertion recess portion (72).

Inventors: Yamamoto; Hiroaki (Miyagi, JP)

Assignee: Keihin Corporation

International Classification: F16K 31/00 (20060101)

Expiration Date: 5/06/12018