Patent ID: 6155290
Filing Date: 2000-12-05
Classification: G05D,Y10T

Abstract:
A gas pressure-reducing valve comprising a diaphragm clamped at a peripheral edge portion thereof between a body and a cover fastened to said body, said diaphragm being spring-urged toward a side which reduces the capacity of a pressure-reducing chamber formed between said diaphragm and said body, in which a valve member that can be seated on a valve seat having at a central portion thereof an opened valve hole leading to said pressure-reducing chamber is fixed on a valve stem which coaxially extends through said valve hole, and in which said valve stem is fastened to a fastened member fixed on the central portion of said diaphragm,wherein said fastened member is provided with: a fitting bore opened at one end thereof on the side of said valve stem and a bottomed threaded bore having a diameter smaller than that of said fitting bore and coaxially leading to the other end of said fitting bore,wherein said valve stem is provided at an end portion thereof on the side of said diaphragm with a fitting stem portion fitted in said fitting bore and an externally threaded portion capable of being screwed in said threaded bore and coaxially leading to said fitting stem portion, andwherein said externally threaded portion has an axial length shorter than that of said fitting bore.