Apparatus for retaining and sealing septum in insertion mechanism for fluid delivery device

A septum and wedge assembly for a fluid delivery device comprising:

• a septum;
• and
• a wedge comprising:
• a cup portion and a stem portion defining a fluid path;
• the cup portion being a unitary, integral component formed from a metal and having a continuous, circumferential side wall and a proximal opening dimensioned to receive the septum therein and a distal opening to the fluid path defined by the stem portion, the side wall having an inner diameter that is less than an outer diameter of the septum to provide radial compression on the septum;
• wherein the cup portion has a retaining edge along the proximal opening of the side wall, the retaining edge being configured to extend over at least a portion of a proximal surface of the septum that is accessible via the proximal opening and provide an axial force along an axis parallel to the stem portion to retain the septum in the cup portion.