Patent ID: 8308679

Claim:
A delivery system for delivering fluidic media to a user, the delivery system 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, one of the first housing portion and the second housing portion supporting a reservoir having an interior volume for containing fluidic media and a plunger head moveable within the interior volume of the reservoir along an axial direction of the reservoir; a drive device supported by the other of the first housing portion and the second housing portion relative to the one of the first housing portion and the second housing portion supporting the reservoir such that upon the first housing portion and the second housing portion being operatively engaged, the reservoir is operatively coupled to the drive device; a pair of interactive elements including a first interactive element supported on the first housing portion and a second interactive element supported on the second housing portion at a location to be interactable with the first interactive element; and circuitry configured to detect an interaction between the first interactive element and the second interactive element, the interaction having a state of a plurality of states; the circuitry configured to determine the state of the interaction; the circuitry configured to provide a signal from a plurality of signals, the plurality of signals corresponding to the plurality of states; and the circuitry configured to, in response to the first housing portion and the second housing portion being operatively engaged and the interaction between the first interactive element and the second interactive element being detected, provide the signal corresponding to the state of the interaction.