Abstract: A brake fluid distribution control system for use in closed antilocking brake systems includes a switch in communication with low pressure accumulators for cyclically activating pumps that evacuate the low pressure accumulators of brake fluid under desired conditions. The method associated with this invention can be implemented by providing an indicator for indicating the amount of fluid within the accumulator and a switch for cyclically activating the pump when the fluid within the accumulator reaches a preselected capacity level. Alternatively, the antilocking brake system electronic controller is provided with appropriate software for cyclically activating the pump that evacuates the accumulators under preselected conditions.

Abstract: A low pressure accumulator assembly for use with a fluid pump comprises a pump housing with a longitudinally extending chamber having a base with a fluid flow opening. An accumulator is secured in the pump housing chamber. The accumulator includes an accumulator housing with a longitudinally extending bore. A piston is biased outwardly of the bore to selectively engage the base of the pump housing chamber. A protrusion extends outwardly from the piston to limit an area of engagement between the piston and the base so that fluid flowing from said opening into the chamber may engage a greater area of the piston.