Patent ID: 6851761

Claim:
A parking brake arrangement for pneumatically operated drum or disk brakes, comprising: a pneumatically operated service brake cylinder with a piston rod for operating and releasing the drum or disk brake, a parking brake actuator which adjoins and is fitted onto the service brake cylinder, and has a self-locking rotating spindle which is driven by an electric motor and acts upon the piston rod so that the operating plunger can be displaced, locked, or both displaced and locked by rotation of the rotating spindle, wherein the rotating spindle has a self-locking thread so that the position of the piston rod can be locked by the rotating spindle; and a control device assigned to the electric motor, the control device operating the electric motor during a particular parking brake actuation to compensate for shrinkages occurring because of cooling-down of the brake during the particular parking brake actuation by performing additional rotation of the rotating spindle.