LOAD DEPENDENTLY CONTROLLED AIR BRAKE SYSTEM FOR VEHICLES, ESPECIALLY RAILBORNE VEHICLES WITH A SPRING BRAKE BOOSTER

摘要

A load responsive air brake system has a load brake valve connected to a main air line and to a spring-loaded cylinder. In the load brake valve are two control pistons which act upon a beam balanced upon a fulcrum which is displaceable in response to the load upon the vehicle. The pressure in a control reservoir connected to the main air line acts upon the corresponding sides of the control pistons and the other side of one control piston is acted upon by the spring loaded cylinder and the other side of the other piston is acted upon by a pressure proportional to the degree of braking.