Patent ID: 6973814

Claim:
A safety key and locking cylinder, the locking cylinder having a stator and a rotor, with a front end and a rear end, and a keyway, and the safety key having an upper and a lower surface each of which is flat and has no projection extending out from either said surface, the safety key having a shank which is provided with a plurality of control surfaces for properly positioning tumblers and a front end and a rear end, wherein at the front end, the rotor is extended and has at least one control surface, which interacts with a control surface, arranged at the rear end of the shank, wherein the control surface arranged at the rear end of the shank is formed by at least one recess on at least one shoulder of the key; wherein the control surface of the rotor is formed by a recess which is located in the rotor and is open at the front; and wherein the recess extends radially in relation to the axis of the rotor and is open at the front and also to the side of the rotor.