Patent ID: 8475408

Claim:
An infusion pump system, comprising: an infusion site interface structure that is adhesively attachable to a skin surface, the infusion site interface structure including: a frame with a generally flat lower surface, a soft cannula coupled to the frame for penetration of the skin surface when the soft cannula extends below the lower surface of the frame, and an upward extension member that extends above the lower surface such that a septum coupled to the upward extension member extends substantially parallel to the generally flat lower surface of the frame and is positioned above the soft cannula when the soft cannula extends below the lower surface of the frame, wherein the infusion site interface structure lacks tubing above the septum coupled to the upward extension member; an infusion pump body comprising an infusion site docking area to receive the upward extension member; and a needle extending from the infusion pump body downwardly toward the lower surface of the frame to penetrate the septum of the infusion site interface structure, wherein the infusion pump body comprises: a housing having a substantially flat lowermost surface and a substantially flat upper surface, a medicine reservoir in fluid communication with the needle, a drive mechanism, and a control system that governs actuation of the drive mechanism, wherein the infusion site docking area and the upward extension member comprise corresponding guiding members that, during engagement, restrict relative rotational and vertical motion between the pump body and the infusion site interface, and wherein a fluid path between the pump body and the soft cannula intermittently breaks and re-establishes as the pump body repeatedly disconnects from and reconnects with the infusion site interface structure while the infusion site interface structure remains adhesively attached to the skin surface.