Patent ID: 6053196
Filing Date: 2000-04-25
Classification: F04B,G05D,Y10T

Abstract:
A flow regulator for regulating a fluid flow delivered by a pump, comprising:a housing having a piston bore, a discharge bore, and a pressure space defined therein, the discharge bore and pressure space being in fluid communication with the piston bore;a control piston disposed in the bore of said housing, said control piston having a base, a control edge that interacts with the discharge bore, and a continuation projecting from the base, the continuation including a first region having a first outer diameter and a second region having a second outer diameter smaller than the first outer diameter, the first and second regions being separated by a sharp-edge step, the control piston being acted on in a first direction by a first pressure generated by the pump and acted on in a second direction by an initial force counteracting the first pressure; anda plug disposed in the bore and having an aperture defined in one end to receive said continuation and form a delivery throttle dependent on a path of the control piston, the aperture having an inner diameter which is greater than the first outer diameter to form a free ring area therebetween when the first region and aperture coincide.