| 摘要 |
<p>A gas cock having a valve body having an axial bore within which is housed a plug rotationally mounted therein for opening and closing the gas cock. The valve body has an inlet passageway and an outlet in communication with the bore. An elastic sleeve is disposed within the bore and circumferentially of a part of the plug body that open sand closes the inlet passageway communication with the bore of the valve body thereby to control gas flow. The sleeve has a fluid-tight seal between it and the bore and between it and the plug portion extending axially therein. The sleeve provided with lateral opening disposed between the two ends thereof in registry with the inlet passageway to establish communication to the inlet passageway. The lateral opening is defined by a lateral annular extension that fits into the inlet passageway precluding axial and rotational movement of the sleeve to the bore. The sleeve is preferably provided with inner circumferentially spaced axial ribs and annular inner ribs on the ends effecting a seal with the part of the plug portion within the sleeve.</p> |
