Patent ID: 8480623
Filing Date: 2013-07-09
Classification: A61M

Abstract:
1. A method of controlling a medical infusion pump system, comprising: receiving via a user interface of a controller device user input related to dispensing medicine, the controller device being removably attachable to a pump device to form a mechanical connection and an electrical connection between the pump device and the controller device; activating a battery-powered motor of a pump drive system housed inside the pump device to rotate one or more full rotations in response to one or more electrical signals communicated from the controller device via the electrical connection, the pump drive system further comprising: a piston rod, and a mechanism to advance the piston rod toward the medicine housed in the pump device, 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, wherein the one or more full rotations of the battery-powered motor cause the pawl to adjust toward one of the first position or the second position; and advancing the piston rod to dispense a portion of the medicine from the pump device.