Patent ID: 6619187
Filing Date: 2003-09-16
Classification: F04B

Abstract:
A radial piston pump, comprising:a pump shaft supported in a housing and having an eccentric longitudinal section; a plurality of guide bushings received in the housing; a plurality of pistons, each piston radially extending from the pump shaft through a corresponding one of the guide bushings, whereby the pistons and the guide bushings are placed into one-to-one correspondence; a support ring rotatably disposed on the eccentric longitudinal section of the pump shaft, the support ring having at least three mutually offset flat support faces uniformly distributed about a periphery of the support ring; support rails disposed on the support ring; a plurality of piston shoes, each piston shoe having a radial flange and connected with a corresponding one of the pistons, whereby the piston shoes and the pistons are placed into one-to-one correspondence, wherein the radial flanges of the piston shoes engage from behind the support rails; and spring-supported pressure rings securing the position of the piston shoes on the support ring so as to prevent rotation therebetween, wherein the guide bushing has an outside diameter that is greater than a diameter of the radial flanges and greater than an outside diameter of the pressure rings.