CPC F16D 65/543 (2013.01) [B64C 25/44 (2013.01); F16D 65/18 (2013.01); F16D 2121/04 (2013.01); F16D 2125/06 (2013.01)] | 12 Claims |
1. A piston assembly for engaging two selectively engageable parts comprising:
a housing defining a piston cylinder, the housing comprising a main body housing defining a chamber and an end cap positioned at a distal end of the chamber of the main body housing adjacent to a pressure plate;
a piston positioned within the chamber; and
an adjuster assembly comprising:
a piston stroke limiter configured to limit a length of a return stroke of the piston from an extended stroke position and a retracted stroke position;
a crushable body acting between the piston and the piston stroke limiter, the crushable body being arranged to reduce in axial length when a length of an extension stroke exceeds a length of a retraction stroke to maintain the length of the return stroke; and
an extension stroke stop defined by a radial surface of the end cap and a retraction stroke stop defined by a radial surface at the distal end of the chamber of the main body housing adjacent to the pressure plate, wherein the piston stroke limiter comprises a limiting member movable in an axial direction between the extension stroke stop and the retraction stroke stop.
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