Abstract: An air disc brake for a road vehicle is proposed, having a mechanism for causing retraction of the brake pads when the brakes are no longer applied, to avoid parasitic drag caused by continued contact of the brake pads against the brake disc. The proposed mechanism includes a pin located in a fixed position relative to one brake pad, and extending through an aperture in the other brake pad. A coil spring is supported on the pin, and pushes the brake pads apart. Where the pin extends through the aperture the extent of the pin provides an indication of the wear state of the pads and disc, which is visible through apertures in the wheel rim.

Abstract: A disc brake that includes a caliper having a housing, an actuation mechanism, and a cover plate. The cover plate is releasably mounted to an outboard facing surface of a housing of the caliper by at least one fastening member that is insertable in a generally inboard direction and removable in a generally outboard direction.

Abstract: A disc brake that includes a caliper having a housing, an actuation mechanism, and a cover plate. The cover plate is releasably mounted to an outboard facing surface of a housing of the caliper by at least one fastening member that is insertable in a generally inboard direction and removable in a generally outboard direction.

Abstract: A parking brake assembly for an air actuated disc brake includes a pneumatic actuator having a push rod for applying a brake force to brake pads. The push rod is generally translatable between a rest position at which the brake force is not applied and an actuated position at which a brake force is applied. The parking brake assembly includes a clamp assembly operable to retain the push rod in the actuated position and thereby apply the parking brake. The clamp assembly is configured for fitment within a caliper housing of the brake.