초록 ▼

An axially shiftable gas control and shut-off valve utilizing a spherical ball check seatable in a frusto-conical valve seat formed along a gas flow path in a valve body member, and a valve stem extending transversely through the body member across the flow path and axially shiftable with respect th

An axially shiftable gas control and shut-off valve utilizing a spherical ball check seatable in a frusto-conical valve seat formed along a gas flow path in a valve body member, and a valve stem extending transversely through the body member across the flow path and axially shiftable with respect thereto along an axis perpendicular to the axis of symmetry of the valve seat. The valve stem has a concentrically-arranged, frusto-conical cam portion operative, when the valve stem member is shifted between one position and another, to move the ball check between seated and unseated positions with respect to the valve seat to control gas flow.

대표청구항 ▼

A gas flow control valve for electric arc torches comprising: a valve Body member having substantially coaxial gas inlet and gas outlet passageways; a bore in said valve body member transverse with respect to and communicating at opposite interior sides thereof with said gas inlet and said gas outle

A gas flow control valve for electric arc torches comprising: a valve Body member having substantially coaxial gas inlet and gas outlet passageways; a bore in said valve body member transverse with respect to and communicating at opposite interior sides thereof with said gas inlet and said gas outlet passageways; a frusto-conical passageway defining a valve seat recess at the inner end of said gas inlet passageway at the junction of said transverse bore; a ball check valve member disposed in said valve seat recess; a valve stem member slidably received within said transverse bore; said valve stem member having a cam means comprising a frusto-conical cam surface portion coaxially formed along said valve stem member and defining a recess in said transverse bore within which said ball check is partially received; said cam means operative upon axially shifting said valve stem member to move said ball check between unseated and seated positions with respect to said valve seat recess; said valve stem member comprising a pair of transversely divided upper and lower valve stem sections, said upper section comprising said frusto-conical cam surface portion, and means for bolting said upper and lower valve stem sections together within said transverse bore; said bolting means comprising a sleeve nut extending through axial bores in said upper and lower valve stem sections and a machine screw threaded in said sleeve nut; means for securing said valve stem sections in end-to-end interfitting engagement comprising a short, tapered cylindrical key portion formed on one of said valve stem sections receivable in a complementary tapered circular recess in the other of said valve stem sections; and means for sealing said upper and lower valve stem sections comprising resilient O-rings seated within annular grooves provided in said upper and lower valve stem sections.