Patent ID: 8851866

Claim:
A reusable pump drive system, the system comprising: a pump cartridge having a piston assembly and a cylinder assembly, the piston assembly comprising a connecting region and a body region, the connecting region of the piston assembly comprising a piston shaft, the body region of the piston assembly comprising a body having a side wall, a check valve, a fluid inlet extending from outside the cylinder assembly through the side wall of the body to the check valve for introducing a fluid into the pump cartridge, a piston having a sealing flange, and an annular groove in an outer surface of the cylinder assembly, a drive shaft adapter having an inner radial cavity to receive a portion of the piston shaft, a first end portion, a second end portion and one or more piston shaft retaining components, a fixed guide member having an inner radial passage extending therethrough, and a pump cartridge cylinder retaining component having a distal engagement pin with an inner end sized and positionable to engage the annular groove on the cylinder assembly, wherein in a first position the pump cartridge cylinder retaining component retains the cylinder assembly in the inner radial passage and in a second position the pump cartridge cylinder retaining component allows insertion of the cylinder assembly into the inner radial passage or removal of the cylinder assembly from the inner radial passage.