Abstract: A disc brake of pin-sliding caliper type having a boot protector including an extension of a liner disposed between a side end surface of a brake pad and an opposite torque receiving surface of a torque member movably supporting the brake pad toward and away from a friction surface of a disc rotor axially thereof. The boot protector protects from heat a boot covering an exposed portion of a slide pin which guides a caliper to urge the brake pad against the disc rotor. The protective extension of the liner extends along an axis of rotation of the rotor away from one end of the torque receiving surface remote from the rotor axially thereof, and is interposed between the boot and a heat source such as the brake pad and the rotor. The liner is preferably provided with a resilient section biasing the brake pad in a direction parallel to the surface of the disc rotor to thereby serve as an anti-rattle spring.

Abstract: A brake booster includes a body having a central wall portion on which a, doughnut-shaped reinforcement plate is securely mounted, and bolts mounted on the reinforcement plate for fastening a master cylinder to the central wall portion. The reinforcement plate has an annular ridge extending along an inner peripheral edge thereof and projecting against the reinforcement plate. The master cylinder includes a flange mounted on the body and having an inner peripheral portion held against the central wall portion of the body in axial alignment with the annular ridge, and an outer peripheral portion spaced from the central wall portion by a distance such that the outer peripheral portion of the flange will not be forced into contact with the central wall portion when the master cylinder is actuated for braking action. Therefore, no localized forces are applied by the outer peripheral portion of the flange to the central wall portion of the body.