AMBULATORY INFUSION PUMP WITH STATIC AND DYNAMIC SEALS

摘要

An infusion pump reservoir assembly (400), comprising: a medicament reservoir including a reservoir barrel with an inner surface; a plunger (435) moveable within the medicament reservoir in a dispensing direction from a full position and including a dynamic seal (462) that is in contact with the inner surface of the reservoir barrel; and a static seal (464) that engages a surface when the plunger is in the full position; wherein the plunger, dynamic seal and static seal are respectively configured and positioned relative to one another such that the static seal is disengaged from the surface in response to movement of the plunger in the dispensing direction from the full position and the dynamic seal remains in contact with the inner surface of the reservoir barrel as the plunger moves in the dispensing direction.