Patent ID: 8529553

Claim:
A delivery device for delivering an infusion medium to a user, the device comprising: a first housing portion adapted to be carried by a user; a second housing portion configured to be selectively operatively engaged with and disengaged from the first housing portion; a reservoir supported by one of the first and second housing portions; at least one of a drive device and a needle inserting device supported by the other of the first and second housing portions relative to the housing portion that supports the reservoir, such that upon the first and second housing portions being operatively engaged, the reservoir is operatively coupled to the at least one of a drive device and a needle inserting device; a first pair of magnets including a first magnet supported on the first housing portion and a second magnet supported on the second housing portion in a position to magnetically interact with the first magnet upon the first and second housing portions being operatively engaged; wherein the first magnet includes a surface for engaging a corresponding surface on the second magnet upon the first and second housing portions being operatively engaged; and wherein the surface of the first magnet is shaped such that at least some of the surface of the first magnet extends toward the second housing portion to be closer to the second housing portion than at least some of the corresponding surface of the second magnet to mate with the corresponding surface of the second magnet upon the first and second housing portions being operatively engaged.