Patent ID: 6152716
Filing Date: 2000-11-28
Classification: F04C

Abstract:
A vane pump with a rotor which receives vanes, with two pressure plates which bear sealingly on the rotor and of which one is arranged on a delivery side of the vane pump and one on the opposite side, and with a contour ring surrounding the vanes and forming two suction and discharge regions, at least one of the two pressure plates being provided with first inlet and outlet orifices which make a first fluid connection between a discharge region and an undervane region, wherein the pressure plate located opposite to the delivery side is provided with second inlet and outlet orifices which make a second fluid connection between one of said discharge regions and a pressure space partially delimited by the pressure plate located opposite to the delivery side, and the pressure plate located opposite to the delivery side seals off the pressure space relative to the other discharge region or comprises a hydraulic resistance between the discharge regions.