| 摘要 |
<p>The brake piston return mechanism (10) comprises a housing (22) which includes housing part (50) that forms with the housing a chamber (59) and an axially extending groove (55). Disposed within the axially extending groove (55) and forming a movable portion (58) of the chamber (59) is an annular actuation piston (70). The actuation piston (70) includes a pair of seals (74) to prevent leakage. Within the housing part (50) is a bore (61) enclosing a first piston (80) that includes an interior radially extending flange (84) and an exterior radially extending flange (82). The exterior radially extending flange (82) is engaged by the actuation piston (70). Located within the first piston (80) is an adjuster mechanism (90). After the first piston (80) has been displaced by the actuation piston (70) and braking has ceased, the first piston (80) is returned to a running clearance (A) by way of the adjuster mechanism (90).</p> |
