Abstract: A brake rigging for a railway vehicle having a singular truck-mounted brake apparatus for generating a braking force and a plurality of disk caliper assemblies for applying the braking force to each wheel. Wedge-like elements are rigidly attached to the braking beams of the truck-mounted brake apparatus and engage a pair of rollers that are pivotably mounted on corresponding ends of a pair of pivoted levers disposed within a disk caliper assembly. The wedge-like elements transmit a generated braking force to the levers, the rocking of which in opposite directions is effective to force the brake shoes against the respective opposite sides of a disc brake rotor to exert the braking force thereon.

Abstract: A hydraulic parking brake assembly for a railroad vehicle braking system is provided for an automatic application of the parking brake in the absence of an air source. The hydraulic parking brake assembly comprises a hydraulic actuator having a hydraulic piston and a spindle. The spindle is capable of entering a hole provided in the back surface of a pneumatic cylinder of the railroad vehicle braking system. Upon the application of hydraulic fluid within the hydraulic actuator, the hydraulic piston and spindle move in a forwardly direction, causing the spindle to contact the piston within the pneumatic cylinder and apply a force to this pneumatic piston as if pneumatic pressure were applied within the pneumatic cylinder. Such application of force to the pneumatic piston initiates a braking sequence to achieve application of the parking brake to the railroad vehicle eliminating the need to manually apply the parking brake with a hand wheel.