ADJUSTABLE VARIABLE LOAD VALVE DEVICE

摘要

A variable load valve device having a fulcrumed lever, the opposite sides of which are acted upon by respective piston stems of opposing piston assemblies subject to air spring pressure and brake cylinder pressure, respectively. Each piston assembly is independently and axially positionally adjustable relative to the lever to vary the effective differential forces which dictate the level at which brake cylinder pressure is cut off to limit the maximum desired brake cylinder pressure for any given air spring pressure. The desired position adjustments of the piston assemblies are made by adjusting screws engaging the respective piston assemblies which require no changes in spring size or piston dimensions.