| 摘要 |
A clutch or brake actuating assembly, e.g., for use in a vehicle automobile transmission to engage a friction device in which first and second pistons are axially slidable in a cylinder. A reaction member is mounted by axially sliding it into place between the two pistons and is provided with a small orifice. Hydraulic fluid enters through a port between the first piston and the member, to move the first piston and begin engagement of the friction device, and subsequently bleeds through the orifice to act on the second piston to increase the engaging force.
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