Abstract: A clearance sensing vehicle brake slack adjuster includes a housing coupled to a brake actuator and supporting a driving worm wheel engaging the brake cam shaft and a driving worm screw having a threaded portion meshed with the driving worm wheel and transferring a brake actuating force, imparted by the brake actuator to the housing, to the driving worm wheel and cam shaft. A wear adjustment mechanism for the adjuster includes a control worm wheel and a clutch ring disposed about the driving worm screw and a wrap spring engaging surfaces of the control worm wheel and the clutch ring. The control worm wheel is in mesh with a control worm screw. The clutch ring is disposed on a side of the control worm wheel opposite the threaded portion of the driving worm screw and includes teeth engaging corresponding teeth on the driving worm screw.

Abstract: A clearance sensing vehicle brake slack adjuster includes a housing coupled to a brake actuator and supporting a driving worm wheel engaging the brake cam shaft and a driving worm screw having a threaded portion meshed with the driving worm wheel and transferring a brake actuating force, imparted by the brake actuator to the housing, to the driving worm wheel and cam shaft. A wear adjustment mechanism for the adjuster includes a control worm wheel and a clutch ring disposed about the driving worm screw and a wrap spring engaging surfaces of the control worm wheel and the clutch ring. The control worm wheel is in mesh with a control worm screw. The clutch ring is disposed on a side of the control worm wheel opposite the threaded portion of the driving worm screw and includes teeth engaging corresponding teeth on the driving worm screw.

Abstract: A ratchet device for providing anti-reverse locking for a grounded slack comprises a pinwheel having flexible angled spokes circumferentially protruding therefrom and a pinion ring into which the pinwheel fits includes a plurality of angled teeth with which the angled spokes mate. The spokes flex and slide over the pinion ring teeth when the ratchet is advanced in a forward direction, and lock against the teeth when the ratchet is not being advanced.

Abstract: A ratchet device for providing anti-reverse locking for a grounded slack comprises a pinwheel having flexible angled spokes circumferentially protruding therefrom and a pinion ring into which the pinwheel fits includes a plurality of angled teeth with which the angled spokes mate. The spokes flex and slide over the pinion ring teeth when the ratchet is advanced in a forward direction, and lock against the teeth when the ratchet is not being advanced.