Patent ID: 9623855
Date: 2017-04-18
CPC Classifications: B60T

Claim:
1. A brake system for a rail vehicle of a train having a locomotive and a plurality of rail cars, comprising: a brake cylinder including a housing having a pressure side and a non-pressure side, a port on the pressure side of the housing for receiving fluid pressure signals, and an actuator comprising a pressure piston carried inside the housing and a first shaft connected to the pressure piston and extending from the non-pressure side of the housing; a parking brake locking mechanism connected to the actuator and responsive to the fluid pressure signals from a fluid-charged brake pipe of a pneumatic brake system extending throughout the locomotive and rail cars of the train at a brake pipe port, the locking mechanism including a second shaft interconnected to the actuator, a locking nut coupled to the second shaft, and a locking sleeve configured to cooperate with the locking nut to lock and unlock the parking brake locking mechanism; and the fluid charged brake pipe being connected to the brake pipe port and providing a fluid force directly on the locking sleeve of the parking brake locking mechanism to move the locking sleeve to unlock the parking brake locking mechanism from a locked position.