Patent ID: 8684146

Claim:
A wear adjustor for a pneumatic disc brake having a rotary-lever-actuated brake application device, the wear adjustor being insertable in an adjusting spindle of the brake application device and being attachable to a caliper of the disc brake via a mounting disc, the wear adjustor device comprising: a drive ring arranged on a drive end of a shaft; an axial bearing arranged on an input side of the drive ring; a ball ramp coupling with a freewheel function arranged on an output side of the drive ring, wherein the ball ramp coupling comprises the output side of the drive ring, balls and an input side of a clutch ring on an output side of the ball ramp coupling; a cone clutch arranged between the ball ramp coupling and a spring sleeve for a cylindrical spring, the cone clutch comprising an output side of the clutch ring and an input side of the spring sleeve; and a torque-dependent coupling having a positive restraint operatively configured axially between the clutch ring and the spring sleeve, the positive restraint being configured to rotationally fix the spring sleeve relative to the clutch ring when the clutch ring is axially displaced toward the spring sleeve until a predetermined threshold torque is applied.