| 摘要 |
<p>A piston and cylinder assembly (1, 16) for a vehicle hydraulic system has a retaining means (11) comprising an insert acting between a piston (4, 19) and the cylinder bore (3, 18) in which it works, the insert (11) having a releasable frictional engagement in the bore (3, 18), and acting as an abutment to hold the piston (4, 19) in its retracted position to maintain the effective length of the assembly at a predetermined value for installation, until the assembly is operated hydraulically. The assembly may be an actuator for a self-energising disc brake, or a slave cylinder for a vehicle clutch system.</p> |
