Patent ID: 8632499

Claim:
An infusion pump device for delivering infusible fluid to a user, the device comprising: a reusable pump portion comprising a motor assembly; and a disposable portion in removable relation to the reusable pump portion, the disposable portion comprising: a cylindrical barrel; a plunger within the cylindrical barrel; and a plunger rod, the plunger rod connected to the plunger and extending away from the plunger to a distal end, the plunger rod having a threaded portion extending over an entire length of the plunger rod from the plunger to the distal end, wherein the disposable portion may be attached to the reusable pump portion, wherein when the disposable portion is attached to the reusable pump portion the plunger rod is engaged with the motor assembly, and wherein the plunger rod is displaceable by the motor assembly.