Radial piston pump or motor with unrestricted inlet means

Abstract From the Canadian patent

A radial piston pump comprises a housing having a drive shaft rotatably mounted therein and a rotor operatively connected to the shaft for rotation therewith. A pintle valve is mounted in the housing and the rotor is rotatably mounted thereon for communicating fluid from an inlet of the housing to an outlet thereof. A plurality of circumferentially spaced and radially extended pistons are mounted on the rotor with each of the pistons having a cylinder reciprocally mounted on an end thereof for pumping purposes. The inlet communicates with an inlet side of the pintle valve via a single inlet passage which communicates unrestricted fluid flow therethrough.