Patent ID: 8262616

Claim:
An infusion pump assembly comprising: a locking tab; a pump barrel inside a pump barrel housing, said pump barrel accommodates a reservoir assembly comprising a reservoir and a plunger rod; and a locking disc at a terminus of said pump barrel, said locking disc having a clearance hole for said plunger rod and at least one locking tab notch, said locking disc being in close proximity with said locking tab, wherein said locking tab is in moveable engagement with said locking tab notch, and wherein said reservoir moves said locking tab from a locked position to an unlocked position when said plunger rod is inserted through said clearance hole, and wherein said locking disc rotates upon torque being applied to said reservoir assembly, said locking disc rotating from a non-loaded position to a loaded position with respect to said plunger rod and a drive screw.