US 4,359,247 AGranted

Brake for rail vehicles

AssigneeThyssen Industrie AG

InventorLuitpold Miller

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Abstract

A brake for rail vehicles comprises a working cylinder defining an accumulator chamber and a counter pressure chamber. A differential piston is movably mounted in the working cylinder and has a first piston surface communicating with the accumulator chamber and a second piston surface communicating with the counter pressure chamber. A restraining device in the form of an additional pressurized chamber communicates with another surface of the differential piston to hold the differential piston motionless. When brakes which are connected to and actuated by the differential piston, are to be activated to slow movement of the vehicle, the restraining device is partially or fully released which permits movement of the differential piston. If such movement causes too rapid a deceleration of the vehicle, the counter pressure chamber is selectively pressurized by a regulating valve to slow the movement of the differential piston and effectively partially or fully release the brakes until deceleration is reduced to acceptable limits. An inertial body is resiliently mounted for movement on the vehicle and controls the regulating valve.

Claims9

Dependent claims

A brake for a rail vehicle comprising:

a working cylinder having an accumulator chamber and a counter pressure chamber;
a differential piston movably mounted in said working cylinder, having a first piston surface communicating with said accumulator chamber, and a second piston surface communicating with said counter pressure chamber;
piston restraining means connected to said working cylinder for restraining and releasing motion of said differential piston;
brake means connected to and actuatable by motion of said differential piston to brake the motion of the vehicle;
a regulating valve connected to said counter pressure chamber for selectively pressurizing said counter pressure chamber by varying amounts to counteract the motion of said differential piston when it is released by said piston restraining means and moved by pressure in said accumulator chamber;
an inertial body mounted for movement on the vehicle in a vehicle travel direction, connected to said regulating valve for actuating said regulating valve to selectively pressurize said counter pressure chamber;
and
spring mounting means connected between said inertial body and the vehicle to permit motion of the inertial body with a predetermined deceleration of the travel motion of the vehicle, whereby motion of said differential piston is restrained by pressurization of said counter pressure chamber with attainment of a maximum allowable deceleration of the vehicle.

5 more elements

Dependencies are inferred from the claim text.