F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/184
F16D 65/52 (2006.01)
Patent
CA 1044161
ABSTRACT OF THE DISCLOSURE A slack adjuster for a cam-actuated vehicle brake that automatically compensates for lining wear of the brake shoes, wherein the slack adjuster is capable of differentiating between that portion of an actuating piston stroke required to take up the running clearance between the brake shoes and brake drum from the non- braking to the braking position and that portion or the piston stroke required for the naturally occurring lining wear of the brake shoes during use. The slack adjuster includes a lever and housing rotated by the actuating piston and positioned on a cam shaft carrying an S-shaped cam for actuation of the brake shoes, A worm gear is positioned on the cam shaft and a worm shaft carries a worm engaging the worm gear and supports an actuator or driving member for the shaft, a one-way spring clutch encompasses the actuator and worm shaft, and a linkage assembly located between the power source and the actuator acts to rotate the worm and thereby adjust the vehicle brake during the brake releasing stroke of the actuating piston, only where there is a greater braking stroke than that required to close the running clearance between the brake shoes and the brake drum'
261154
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