BRAKE ACTUATOR HAVING COLLET STYLE SLACK ADJUSTER

摘要

A brake actuator includes a tubular housing member, connectedat a first end to a cylindrical housing with a member for admittingfluid, a piston with a sealing member mounted for reciprocalmovement within such cylindrical housing, a tubular stem connectedat one end to such piston, the tubular stem having a first conicalsurface at its other end, a piston return disposed intermediatesuch first piston and the tubular housing, a flange connected atone end to another end of the tubular housing, a pair of abutmentsurfaces carried by such flange and an externally threaded rodhaving a first portion extending inside the tubular housing andsuch tubular stem and a second portion extending outwardly fromsuch tubular housing and through the flange, the improvement of acollet style slack adjuster to adjust for wear of braking elements.Such collet style slack adjuster including a power colletthreadedly engaging such threaded rod and a first plurality offlexible fingers connected to such power collet and positionedaround such threaded rod. A second conical surface carried by suchpower collet matingly engages the first tubular stem conicalsurface for providing a clutch surface. A slack adjuster colletthreadedly engages such threaded rod intermediate the power colletand the second end of such threaded rod. A portion of the slackadjuster collet is disposed between the flange abutment surfacesand a second plurality of flexible fingers are connected to theslack adjuster collet and positioned around such threaded rod.