Patent ID: 6431329
Filing Date: 2002-08-13
Classification: B60T,B61H

Abstract:
A parking brake for a rail vehicle having a brake cylinder with a first piston in the brake cylinder responsive to fluid signals to apply and release brakes on the vehicle, the parking brake comprises:a housing; a second piston in the housing and coupled to the first piston; an apply port in the housing for receiving a pressure signal to move the second piston to an apply position; a locking clutch including a first clutch surface carried by the housing and a second clutch surface carried by the second piston, the clutch surfaces disengage and unlock the second piston in response to the pressure at the apply port and engage and lock the second piston in the applied position in response to removal of pressure at the apply port; and wherein the brake cylinder and the first piston have openings for receiving connections of a hand brake and the second piston is connected to the first piston via these openings.