초록 ▼

A quick-action shut-off value includes a valve member normally urged by the inlet pressure to close a valve seat, a movable carrier member normally urged towards the valve seat by a biassing spring, but moved away from the valve seat by the inlet pressure, and a lost-motion connection between the va

A quick-action shut-off value includes a valve member normally urged by the inlet pressure to close a valve seat, a movable carrier member normally urged towards the valve seat by a biassing spring, but moved away from the valve seat by the inlet pressure, and a lost-motion connection between the valve member and carrier member effective, when the carrier member and the valve member are in their initially closed positions with respect to the valve seat and the inlet pressure increases, to permit the inlet pressure initially to move the carrier member away from the valve seat while the valve member is held to the valve seat by the inlet pressure, until the lost-motion connection is taken-up, whereupon the carrier member moves the valve member away from the valve seat to open the valve.

대표청구항 ▼

A quick-action shut-off value, comprising: a housing having an inlet and an outlet interconnected by a connecting passageway having a valve seat; said inlet, outlet and valve seat all having a common longitudinal axis; and a valve assembly on the inlet side of said valve seat; said valve assembly co

A quick-action shut-off value, comprising: a housing having an inlet and an outlet interconnected by a connecting passageway having a valve seat; said inlet, outlet and valve seat all having a common longitudinal axis; and a valve assembly on the inlet side of said valve seat; said valve assembly comprising: a valve member normally urged by the inlet pressure towards said valve seat to close said connecting passageway; a movable carrier member normally urged towards said valve seat by a biassing spring, but moved away from said valve seat by the inlet pressure; and a lost-motion connection between said valve member and said carrier member, effective when the carrier member and the valve member are in their initially closed positions with respect to said valve seat and the inlet pressure increases, to permit the inlet pressure initially to move the carrier member away from the valve seat while the valve member is held to the valve seat by the inlet pressure, until the lost-motion connection is taken-up, whereupon the carrier member moves the valve member away from said valve seat to open the valve; said movable carrier member being of cylindrical configuration and having a longitudinal axis coaxial with said common longitudinal axis of said inlet, outlet and valve seat; said lost-motion connection including a second spring of lighter force than said biassing spring, and normally urging said valve member towards said carrier member; said movable carrier member including an end wall on the side thereof facing said valve seat; said lost-motion connection comprising a stem movable through an opening in said end wall and carrying at one end said valve member; said second spring being interposed between the opposite end of the stem and the carrier member to normally urge said valve member towards said carrier member.