Patent ID: 7922462
Filing Date: 2011-04-12
Classification: A61M

Abstract:
1. A pump assembly comprising: an actuator lever comprising a support portion and an arm portion having a longitudinal extent, an actuator for moving the actuator lever, at least a part of the actuator being attached to the support portion of the actuator lever, a supporting structure, a pump comprising a pump member moveable by actuation of the actuator lever, wherein the pump is adapted to pump a liquid between an inlet and an outlet thereof, the pump inlet is adapted to be arranged in fluid communication with an outlet of a reservoir adapted to contain a fluid drug, the pump outlet is adapted to be arranged in fluid communication with a transcutaneous access device, the pump member performing a pump stroke when actuated by the actuator lever, and wherein the pump further comprises inlet and outlet valves associated with the pump inlet and the pump outlet respectively, and a pump chamber abutting the pump member, the pump member is adapted to perform a pump stroke and a suction stroke when moved between a first and a second position respectively, wherein the pump chamber is caused to contract and expand due to the movement of the pump member, a first stationary pivoting joint formed between the actuator lever and the supporting structure and located at a proximal end of the arm portion of the actuator lever, a second floating pivoting joint formed between the actuator lever and the pump member and located between the first stationary pivoting joint and the support portion of the actuator lever, the second floating pivoting joint allowing the pump member to float relative to the actuator lever, a constant-length actuator arm being defined by a portion of the arm portion of the actuator lever formed between the first stationary pivoting joint and the second floating pivoting joint, wherein the second floating pivoting joint is comprised of a lever joint structure on the arm portion of the actuator lever that cooperates with a substantially planar surface of the pump member, the second floating pivoting joint allowing the actuator lever and the lever joint structure to float relative to the planar surface.