Importance

Loading Importance Indicators...

Abstract

A fluid-displacement radial piston machine, such as a hydraulic pump or motor, includes an eccentric member which is mounted on a shaft for displacement radially thereof to thereby change the eccentricity of a contact surface of the eccentric member which is engaged by sliding shoes of a plurality of working pistons. An arrangement for displacing the eccentric member includes a piston component which is connected to the eccentric member by two displacing portions and whose piston portion subdivides a compartment of the shaft into two actuating chambers into which pressurized fluid is selectively admitted through respective passages in the shaft and through a rotary transmission interposed between a source of the pressurized fluid and the shaft. One check valve is interposed in each of the passages and interrupts the communication of the respective actuating chamber with the rotary transmission when no pressurized fluid is admitted into any of the passages. A throttling gap may be provided in each of the passages and may be constituted by a control member received in a bore and acting on the respective check valve to open the same when the eccentric member is to be displaced.

Loading the Abstract Image...

First Claim