Abstract: A gas leak sensor shutoff valve includes a cylindrical body having a connector nipple secured in an inlet port and adapted to be secured to a gas supply pipe. An internal bore extends within the body and joins the inlet port in coaxial fashion. The internal end surface of the connector nipple includes a pair of diametrically opposed slots. A valve assembly is translatably disposed within a stepped valve chamber in the bore. The valve assembly includes a cylindrical sidewall closed at one end, and a pair of opposed holes extending through the sidewall. A gasket is secured to the closed end of the valve assembly, the periphery of the gasket extending outwardly from the valve assembly to impinge on an annular shoulder within the bore. A flow path extends from the connector nipple, through the slots in the internal end of the connector nipple, past the gap between the sealing gasket and the annular shoulder, and through the holes in the cylindrical sidewall to the distal end of the internal bore.

Abstract: A shutoff valve for a portable gas appliance to detect an upset or inverted disposition of the appliance and immediately stop all gas flow includes a valve body having an inlet port that is threaded to be secured directly to a compressed gas tank, and a stem extending outwardly therefrom to actuate the safety valve typically provided in the tank outlet. An internal bore extends within the valve body and includes a proximal end that joins the inlet port in generally coaxial fashion. The internal bore is adapted to be oriented preferably in an upright attitude. At the distal end of the bore a threaded female receptacle is formed. An O-ring seal concentrically within a medial portion of the bore, and a valve ball is translatably retained between the O-ring seal and the valve stem. If the appliance becomes upset or overturned, the valve ball will be driven gravitally to roll toward the O-ring seal.

Abstract: A gas leak sensor shutoff valve includes a cylindrical body having a connector nipple secured in an inlet port and adapted to be secured to a gas supply pipe. An internal bore extends within the body and joins the inlet port in coaxial fashion. The internal end surface of the connector nipple includes a pair of diametrically opposed slots. A valve assembly is translatably disposed within a stepped valve chamber in the bore. The valve assembly includes a cylindrical sidewall closed at one end, and a pair of opposed holes extending through the sidewall. A gasket is secured to the closed end of the valve assembly., the periphery of the gasket extending outwardly from the valve assembly to impinge on an annular shoulder within the bore. A flow path extends from the connector nipple, through the slots in the internal end of the connector nipple, past the gap between the sealing gasket and the annular shoulder, and through the holes in the cylindrical sidewall to the distal end of the internal bore.