Fail safe self-adjusting disc brake

摘要

A fail safe self-adjusting brake is disclosed in which a service piston selectively actuates brake discs to contact shaft discs and apply braking to the shaft. The service piston is hydraulically actuated. Should there be a system failure an emergency piston forces the service piston to brake shaft rotation. The service and emergency pistons are uniquely mounted such that they are properly guided within the brake housing. In a further feature of the present invention, the location of the brake discs relative to the shaft discs is adjustable to vary the amount of movement necessary to cause braking. This adjustment allows the brake discs to move relative to the housing to accommodate wear on the brake or shaft discs. A gage is mounted within the housing to monitor the amount of adjustment of the brake discs, and thus to give an indication of the wear on those discs.