초록 ▼

An improved brake system includes a parking brake piston fixed to the backing plate of a brake friction material for a large vehicle. Service brake pistons are positioned about the parking brake piston. Both the service and parking brake may selectively actuate the brake. Upon actuation by the servi

An improved brake system includes a parking brake piston fixed to the backing plate of a brake friction material for a large vehicle. Service brake pistons are positioned about the parking brake piston. Both the service and parking brake may selectively actuate the brake. Upon actuation by the service brake piston, the parking brake piston moves with the backing plate. The parking brake is set by a parking brake actuator which is connected through a connector to the parking brake piston. When the service brake is set, it causes the connector to move with the parking brake piston. If adjustment is necessary, the connector will hit a stop, and adjustment of the connector along the parking brake piston will occur to compensate for wear on the friction material.

대표청구항 ▼

[ We claim:] [1.] A brake system comprising:a parking brake piston operably connected to an actuator, said actuator being biased in a first non-actuated direction by a fluid pressure, and biased towards an actuated position in opposition to the fluid pressure by a spring bias;a backing plate and fri

[ We claim:] [1.] A brake system comprising:a parking brake piston operably connected to an actuator, said actuator being biased in a first non-actuated direction by a fluid pressure, and biased towards an actuated position in opposition to the fluid pressure by a spring bias;a backing plate and friction material fixed to said parking brake piston; andstructure allowing adjustment of the relative position of said actuator and said parking brake piston to compensate for wear on said friction material said adjustment structure including incremental teeth on an outer peripheral surface of a portion of said parking brake piston, and a connector selectively transmitting movement from said actuator to said parking brake piston, said connector having selectively mating incremental teeth, such that said teeth on said connector and said parking brake piston can move out of engagement to allow said parking brake piston to move relative to said actuator to provide said adjustment.