Improvements in actuator assemblies for vehicle brakes

An actuator assembly incorporates a strut assembly of which the effective length is adjustable to compensate for wear of a friction lining and through which a brake-applying force is transmitted to a braking member, and an adjuster mechanism arranged in parallel with the strut assembly. The adjuster mechanism is arranged in parallel with the strut assembly and incorporates a spring in which energy is adapted to be stored. The mechanism is adapted to receive a signal dependent upon movement of the strut assembly in a brake-applying direction, and is also adapted to apply an adjusting force to the strut assembly in response to energy released from the spring when the brake is itself released.