Patent ID: 8282601

Claim:
A medical infusion pump system, comprising: a pump device including: a pump housing that defines a space to receive a medicine cartridge, a cap device to secure with the pump housing to enclose the medicine cartridge in the pump housing when the medicine cartridge is received in the space the of the pump housing, and a pump drive system to dispense medicine from out of the pump device, the pump drive system including: a piston rod to advance toward the medicine cartridge and force the medicine from the pump device; a mechanism to advance the piston rod toward the medicine cartridge, the mechanism comprising a pawl and a ratchet member, the pawl positioned to engage one or more teeth of the ratchet member, wherein the pawl is adjustable between a first position and a second position to move the ratchet member in a forward direction so as to cause the piston rod to advance toward the medicine cartridge; and a battery-powered motor having an output that rotates one or more full rotations to cause the pawl to adjust toward one of the first position or the second position; and a removable controller device that is removably attachable to the pump device so that a mechanical connection and an electrical connection is formed between the pump device and the controller device, the controller device including: control circuitry that communicates electrical signals to the pump drive system via the electrical connection, and a user interface display.