| 摘要 |
An improved disk clutch structure in which a hydraulic piston provides the force to cause frictional contact between clutch plates. The invention resides in the use of a drain conduit and pressure responsive drain valve in combination with a vent conduit and a pressure responsive vent valve to remove hydraulic fluid from the hydraulic cylinder on inactivation of the clutch with the location of conduits being such that removal of the fluid from the cylinder is assisted by centrifugal forces created by moving clutch parts and such that only the hydraulic cylinder is evacuated.
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