B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 13/58 (2006.01) B60T 17/16 (2006.01) B61H 13/00 (2006.01) B61H 13/02 (2006.01) B61H 13/36 (2006.01) B61H 15/00 (2006.01) F16D 65/14 (2006.01) F16D 65/28 (2006.01) F16D 65/56 (2006.01)
Patent
CA 2292008
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.
Macrae & Co.
Westinghouse Air Brake Company
LandOfFree
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