Hydraulic parking brake for a vehicle, with a locking device comprising a screw that can be rotated to displace a nut, comprises a spring between the nut and hydraulic piston

摘要

Hydraulic parking brake for a vehicle, comprising a brake piston (5) in a hydraulic cylinder (9) with a locking device (2) comprising a screw (3) that can be rotated to displace a nut (4) axially to lock the brake, comprises a spring (6) between the nut and the piston. Monitoring the operating of a spring in a parking brake as above by operating the brake, establishing a predetermined pressure in the hydraulic chamber, operating the locking device and optionally monitoring the operation of the locking device.