Regie Autonome Des Transports Parisiens

Wabco Westinghouse Equipements Ferroviaires

Wabco Westinghouse Equipements Ferroviaries

Regie Autonome Des Transports Prisiens 'ratp'

Christian Doireau

Michel Grenier

Laurent Meret

Daniel Cieplinski

Gerard Leturgie

Jean-Etienne De La Gorge

Yves Thurin

Jean-Etienne De La Gorce

Yvers Thurin

A braking system having a disk brake that is mechanically connected to at least one wheel of the vehicle and cooperates with a brake caliper that is actuated by a threaded rod screwed through a threaded connection in a control nut rotatively mounted inside the caliper body, the threaded connection being irreversible by axial forces alone. The brake linings are made of an elastomeric material having a high friction coefficient when the disk is not rotating. This system provides a compact parking brake having a high power and a large remote-indication capacity, and is particularly useful in railroad vehicles.

Vehicle park braking system

Braking unit for vehicle, of the type comprising an axial actuating helical spring maintained in release position, against its elastic reaction force, through a screw-nut system rotatively driven by an electric motor, the spring acting upon the brake through the intermediary of a hydraulic master cylinder of which the piston is axially connected to an abutment ring of the spring also mechanically connected, via a screw-nut system to the rotor of an electric motor, such an unit being applied to a spring braking system for a vehicle possibly with a built-in park brake.

Spring brake unit and its application to a braking system

Growing community of inventors

Paris, France

Christian Doireau