| 摘要 |
<p>An adaptor for a tap for use in washrooms and the like to prevent the wastage of water comprises a tap body (2) in which a plunger (1) is slidably mounted and which can be pushed in one direction against the force of a spring (17) which urges the plunger in the opposite direction relative to the body. Valve means (6) are provided to allow the spring (17) to move the plunger (1) in the opposite direction. In order to open the tap, the plunger is pushed in said one direction and the spring (17) is compressed. When the plunger (1) is released, the compressed spring (17) re-exerts itself but return movement of the plunger is controlled by bores (8, 9) and a seal (12) which effect a time delay before the plunger is effective to close the tap.</p> |
