Patent ID: 7845202

Claim:
An interchangeable electromechanical lock core, comprising: a plug; a knob affixed to said plug, the knob comprising an access control reader; and a blocking cam having a first position and a second position, wherein when the blocking cam is in the first position the lock core is held securely within a lock housing, wherein when the blocking cam is in the second position the lock core is removeable from the lock housing, wherein, in a first state, the blocking cam is operatively disengaged from the plug and, in a second state, the blocking cam is operatively engaged with the plug, wherein the position of the blocking cam is controlled by rotation of the plug when the blocking cam is in the second state, wherein rotation of the plug is dependent upon the coupling between the plug and the knob, and wherein coupling between the plug and knob is selectively engaged only upon presentation of a valid control credential to the access control reader.