CONTROL APPARATUS FOR OPERATING AND RELEASING HAND BRAKE

摘要

PROBLEM TO BE SOLVED: To provide a control apparatus capable of operating a hand brake assembly of a railroad vehicle. SOLUTION: This control apparatus includes a hydraulic source 14 engageable with the railroad vehicle, and a pneumatic valve 16 is connected with the hydraulic source to start the transmission of hydraulic pressure from the hydraulic source. A force adjusting valve 18 is connected with the pneumatic valve to receive hydraulic pressure from the pneumatic valve, and a mechanically driven valve 20 is connected with the force adjusting valve to receive hydraulic pressure from the force adjusting valve to operate the hand brake assembly by transmitting the hydraulic pressure to a brake cylinder 12. An electronically controlled valve may be arranged at an intermediate position between the hydraulic source and the force adjusting valve to start the communication of fluid from the hydraulic source to the force adjusting valve electrically.