Patent ID: 8640833

Claim:
A disc brake for use with a brake disc, comprising: a caliper operatively configured to straddle the brake disc; a brake application device arranged in the caliper, the brake application device comprising a brake lever and two control spindles, the control spindles being arranged parallel to and spaced apart from one another and being moveable axially via the brake lever to press brake pads against the brake disc; and a wear adjusting device operatively arranged in the caliper between the two control spindles and being operatively connected to the control spindles via a gearing, the adjusting device being actuable via the brake lever in order to compensate for wear-induced changes in an air gap between the brake pad and the brake disc by axially displacing the two control spindles; wherein the adjusting device comprises a central drive input element coupled to a drive input spindle via a ball ramp coupling, the ball ramp coupling having a drive output disc, which engages into the drive input element, and a coupling ring, a torsion spring comprising a spiral spring has one end connected to the drive output disc and the other element connected to the coupling ring.