Patent ID: 6655927
Filing Date: 2003-12-02
Classification: F04B

Abstract:
A radial piston pump comprising a pump body having a plurality of cylinder bores formed therein and a pump piston being located within each respective one of the cylinder bores, each one of the pump pistons being driven by a cam, and each of the cylinder bores communicating with a fluid inlet and a fluid outlet;wherein each one of the pump pistons (3) has an arrangement for controlling at least one of fluid entering the cylinder bore, through the fluid inlet, and fluid exiting the cylinder bore, through the fluid outlet; and a piston coil spring (16) is inserted, between an upper end of the pump piston (3) and a lower end of a valve plug (5) and the piston coil spring (16) is anchored to both the pump piston (3) and the valve plug (5) to minimize rotation of the pump piston (3) about a longitudinal axis thereof during operation of the radial piston pump.