Patent ID: 6155285
Filing Date: 2000-12-05
Classification: F16K,Y10T

Abstract:
A gas safety valve comprising:a main body including a longitudinal through hole that defines a gas passage of a stepped configuration, the longitudinal hole having an inlet end, an outlet end, a first mediate section adjacent to the outlet end, and a second mediate section between the first mediate section and the inlet end, the second mediate section having a diameter greater than that of the first mediate section, the main body further including an outer flange on an outer periphery thereof;a spring mounted in the longitudinal through hole;a ball movably mounted in the longitudinal through hole and capable of blocking the gas passage at an area that receives the spring;a connector mounted around a portion of the main body and adapted to be connected to a valve seat having a valve stem with a gas supply hole communicated with a gas source, the connector including an inner flange;a restraining member mounted in the connector and engaged with the inlet end of the main body, the restraining member including an inlet communicated with the gas supply hole of the valve stem and an outlet that is not blockable by the ball; andan insert mounted between the inner flange of the connector and the outer flange of the main body, the insert being molten when it reaches a pre-determined temperature such that the inlet of the restraining member is not communicated with the gas supply hole of the valve stem.