| 摘要 |
A clutch is disclosed including at least one fixed member, at least one clutch plate movable between engaged and disengaged positions, a housing about the clutch plate, a piston to move the clutch plate, a pressurized fluid supply to the piston, a passage through the piston, and a valve member located proximate the passage for opening and at least partially closing the passage. Also disclosed is a clutch including at least one fixed member, at least one clutch plate movable between engaged and disengaged positions, a housing about the clutch plate, a piston to move the clutch plate, an opening through the piston, and a valve member disposed within the opening for opening and closing the passage. Also disclosed is a clutch including at least one fixed member, at least one clutch plate movable between engaged and disengaged positions, a housing about the clutch plate, a piston to move the clutch plate; a pressurized fluid supply to the piston; and a valve member located within the piston for selectively transmitting the pressurized fluid from a first end of the piston to a second end of the piston based upon the fluid pressure at the first end of the piston.
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