Automatic slack adjuster

Details Automatic slack adjuster Automatic slack adjuster

F - Mech Eng,Light,Heat,Weapons

16

D

188/139

F16D 55/22 (2006.01) F16D 65/14 (2006.01) F16D 65/56 (2006.01)

Patent

CA 1183465

ABSTRACT OF THE DISCLOSURE A single-acting, clearance sensing slack adjuster for brakes is provided. The slack adjuster includes a displaceable brake actuation means (28), a rotatable driving member (52), a rotatable intermediate member (60) and a rotatable driven member (56). The driven member is in driving relationship with a rotatable adjustement member (50) which is rotatable in a given direction to advance a brake friction member (32) to maintain the running clearance (38) within predetermined limits. Means (76-80) are provided to rotate the driving member in the slack decreasing direction of rotation in response to greater than predetermined movement (82) of the brake actuation means. A first coil clutch (20) couples the driving and intermediate members while a second coil clutch (72) couples the intermediate and driven members. One clutch (72) delivers torque in the given direction in its low torque transmitting capacity direction of rotation and that torque capacity is less than is required to rotate the rotatable actuation members when the brake friction members are engaged.

375068

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