Patent ID: 6345959
Filing Date: 2002-02-12
Classification: F04C,F15B,Y10T

Abstract:
A fluid pump having a housing, a main output port, an auxiliary output port and a priority pressure regulating valve contained within the housing, wherein the priority pressure regulating valve comprises:a spool having two opposing end faces, each end face being disposed within a chamber which is in fluid communication with the main output port; a force means associated with one of the spool end faces to bias the spool to a position where it causes fluid developed by the pump to flow to the main output port exclusively; and a pressure release means in fluid communication with one of the chambers which enables fluid to flow from said one of the chambers when the pressure at the main output port is at least equal to a predetermined working pressure thereby establishing a pressure differential across the two end faces of the spool which is sufficient to overcome the bias developed by the force means thus causing the spool to move to a position where it permits fluid developed by the pump to flow to the auxiliary output port.