Balancing valve for a load-responsive brake pressure regulator for vehicles

摘要

A balancing valve comprises a housing in which is mounted a pressure regulator valve for establishing a control pressure proportional to the load of the vehicle. A spring plate is supported on its edge within the housing and is subjected to a proportion of the vehicle load on an intermediate annular portion thereof. A flexible diaphragm is responsive to the force of the control pressure and acts against the central portion of the spring plate in opposition to the vehicle load. The spring plate is provided with a central opening having a plurality of slots radiating therefrom to reduce the spring rigidity of the plate. As a modification, the spring plate may be provided with a reduced thickness portion defining an annular area concentric to the center of the plate. A thrust element is supported in the center of the spring plate to be acted upon by the diaphragm.