| 摘要 |
A dripless plunger (10) includes a head (16) connected to a shaft (15) and a cover (14) movable under user control of an actuator (12) on the shaft (15) from a closed position in which the cover (14) overlies the head (16) to prevent drippage from the head (16) after use of the plunger (10) to clear a clogged drain, and an open position in which the cover (14) is moved to a position remote from the head (16) to permit the head (16) to be placed sealingly about the drain and deformed for forcing water through the drain t o unclog the same.
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