Patent ID: 7887512

Claim:
A medical infusion pump system, comprising: a pump device including: a pump housing including an interior wall that slidably receives an outer wall of a pre-filled medicine cartridge insertable through an opening defined by the pump housing; a drive system to dispense medicine from the pre-filled medicine cartridge when the pre-filled medicine cartridge is slidably received in the pump housing, the drive system including a piston rod that is incrementally movable to apply a dispensing force; one or more electrical contacts disposed on an exterior of the pump housing; and a removable controller device including: a controller housing that houses control circuitry and a power source and that is removably attachable to the pump housing in a fixed relationship; one or more electrical contacts disposed on an exterior of the controller housing, the electrical contacts disposed on the exterior of the controller device being engageable with the electrical contacts disposed on the exterior of the pump device when removably attached; wherein the pump device and the controller device, when removably attached, provide a portable unit.