Patent ID: 6769351
Filing Date: 2004-08-03
Classification: F04B,F16C

Abstract:
A radial piston pump comprising a rotating pump shaft having a portion that is fixedly attached to an eccentric ring, a needle roller bearing being arranged on an outer peripheral surface of the eccentric ring, said needle roller bearing comprising a needle roller bushing having two radially inward directed flanges between which needle rollers are guided in a cage roll, an outer raceway for the needle rollers being formed by an inner peripheral surface of the needle roller bushing and an inner raceway for the needle rollers being formed by the outer peripheral surface of the eccentric ring, a stop washer being arranged on one side between one of the flanges of the needle roller bushing and the eccentric ring, said stop washer overlapping the eccentric ring radially, so that an inseparable assembly is formed, and at least one pump plunger that is arranged in a pump housing and extends radially to the pump shaft being supported through an end face on the needle roller bushing, wherein the stop washer is retained in a circumferential groove of the needle roller bushing and is surrounded radially by an adjacent one of the flanges of the needle roller bushing, and said stop washer comprises an axially inward open annular groove in which the cage is guided.