| 摘要 |
<p>A hydraulic clutch having a piston controlling the engagement of a frictional multiple disk clutch and a drift-check valve for selectively exhausting the liquid under pressure from an operating chamber behind the piston. The drift-check valve comprises a relief passage and a truncated-conical valve element, which valve element blocks the relief passage with the flat base or end surface thereof upon an increase in the fluid apply pressure, and opens the relief passage by tumbling of the valve element upon a decrease in the fluid pressure.</p> |
