Patent ID: 8430849

Claim:
An infusion pump apparatus, comprising: a housing having therein a cartridge receiving area, a plunger pusher that is movable between a retracted position and an extended position, and a drive mechanism, including a motor, that drives the plunger pusher; a contact member that is biased to a cartridge lock position, where an end thereof extends into the cartridge receiving area, and is movable relative to the cartridge receiving area to an unlock position; the plunger pusher and contact member being operably connected to one another such that the contact member will be locked in the lock position in response to the plunger pusher moving out of the retracted position; and a medicament cartridge, having a medicament reservoir and a plunger, positionable in an inserted position in the cartridge receiving area; the contact member, the cartridge receiving area and the cartridge being configured such that the cartridge will be locked in the cartridge receiving area when the contact member is in the lock position; and the contact member, the cartridge receiving area and the cartridge being configured such that the cartridge can be inserted into or removed from the inserted position when the contact member is in the unlock position.