Park and service brake arrangements

摘要

A brake assembly capable of providing a park/emergency brake facility and a service brake facility acting on the same friction pad or friction pad pair. The assembly includes a rotatable disc rotor, and at least one friction pad adapted for movement towards a braking surface of the disc rotor to provide a braking effect. The assembly further includes a first brake activating means to provide the park/emergency brake facility operable selectively to urge said one friction pad towards the braking surface of the disc rotor, a second brake activating means to provide a service brake facility selectively operable independently of the first brake activating means to urge the one friction pad towards the braking surface of the disc rotor. A third means normally acts to prevent the first brake activating means from urging the one friction pad towards the braking surface of the disc rotor.