Patent ID: 8034026

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, a plunger rod and a locking hub fluidly connected to said reservoir, said locking hub comprising: at least two locking hub alignment tabs, said locking hub alignment tabs aligning with at least two reservoir alignment tabs when said locking hub is fluidly connected to said reservoir; a locking disc at a terminus of said pump barrel in close proximity with said locking tab, said locking disc comprising: a clearance hole for said plunger rod; at least one locking tab notch; and at least two reservoir tab openings for mating with said at least two reservoir alignment tabs on said reservoir; and a hub and battery end cap, said end cap comprising: an opening to said pump barrel, said pump barrel opening being complementary to said locking hub alignment tabs; and a first alignment feature, said first alignment feature complementary to a second alignment feature on said reservoir, wherein when said first and second alignment features are aligned, said locking hub alignment tabs are aligned with said hub and battery cap opening, and wherein the loading of said reservoir assembly provides alignment of said reservoir alignment tabs with said reservoir tab openings and said plunger rod with said clearance hole, and 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.