Patent ID: 8333733

Claim:
A delivery device for delivering an infusion medium to a user, the device comprising: a disposable housing portion adapted to be secured to a user; a durable housing portion configured to be selectively engaged with and disengaged from the disposable housing portion to allow disposal of the disposable housing portion without disposing of the durable housing portion; a reservoir supported by the disposable housing portion, the reservoir having an interior for containing a fluidic medium and a plunger moveable within the interior of the reservoir, the plunger having a threaded portion; a rotatable shaft having a longitudinal axis parallel to and displaced from the longitudinal axis of the reservoir, the rotatable shaft having a threaded portion engaged with the threaded portion of the plunger, wherein rotation of the rotatable shaft causes the rotatable shaft to move along the length of the threaded portion of the plunger to vary the interior volume of the reservoir; and a drive device supported by the durable housing portion in a position to operatively connect to the rotatable shaft, to selectively rotate the rotatable shaft, when the disposable and durable housing portions are engaged.