Patent ID: 7134638
Filing Date: 2006-11-14
Classification: F16K

Abstract:
1. A stop valve that opens and closes a passage connected to a high-pressure gas tank, the stop valve comprising: a valve body comprising a valve element comprising an annular sealing member; a rotating operation member comprising a male threaded portion; and an urging member; wherein the valve element slidably interacts with the sliding hole portion of the valve body so as to engage and disengage an end of the valve element with the valve seat and correspondingly close and open the passage; the annular sealing member slidably seals an outer circumferential surface of the valve element and an inner circumferential surface of the sliding hole portion of the valve body; the male threaded portion of the rotating operation member is threadably fastened to the corresponding female threaded portion of the valve body; the urging member biases the valve element away from the valve seat and causes contact between the rotating operation member and the valve element; the rotating operation member has an axis of rotation substantially coincident to a longitudinal centerline of the valve element; one end of the rotating operation member abuts on an other end of the valve element opposite to the end of the valve element opposing the valve seat at a point of contact centered about the axis of rotation of the rotating operation member; rotation of the rotating operation member causes the valve element to slidably interact with the sliding hole portion of the valve body; the one end of the rotating operation member directly opposing the valve element is in a substantially hemispherical shape; and the other end of the valve element directly opposing the rotating operation member is substantially planar.