Patent ID: 8257345

Claim:
An apparatus for connecting a removable fluid medication reservoir to a fluid conduit and venting an infusion device; the apparatus comprising: a cap for coupling a fluid medication reservoir to a fluid conduit; a housing engagement member comprising a detent or a thread projecting outward from a cylindrical external surface of the cap and adapted to engage an engagement member disposed in a housing recess within the infusion device, wherein the cap connects with the fluid medication reservoir and both the cap and the fluid medication reservoir at least partially fit inside the housing recess of the infusion device and are insertable and removable from the housing recess within the infusion device upon rotation of the cap; a conduit cavity disposed in the cap and adapted to secure the fluid conduit to the cap; a first tab disposed on the cap so as to provide a first surface for a user to grip and twist the cap to engage the cap with the infusion device upon rotation of the cap, wherein the first tab projects outward from the cap such that the first surface of the first tab is disposed in an orientation perpendicular to a plane defined by the circumference of the cap; and a vent disposed in the cap that permits the passage of air and simultaneously inhibits the passage of fluids so as to permit fluid resistant venting of air through the vent and equalization of pressure inside the infusion device to atmospheric pressure outside the infusion device.