Patent ID: 8561444

Claim:
A programmable cylinder lock of the type comprising a stator ( 1 ) and a cylindrical rotor ( 2 ), mounted inside the stator ( 1 ) for rotation around its own axis and having a keyhole extending in a direction of the axis for insertion of a key ( 3 ), and comprising inside rotor ( 1 ) a number of key followers ( 4 ) movable along their own longitudinal and transversal directions, intended to cooperate with codification conformations of a key ( 3 ) inserted into the keyhole of the cylindrical rotor ( 2 ), and a number of locking pins ( 6 ) movable along their own longitudinal direction, which form lock blocking members, said key followers ( 4 ) and locking pins ( 6 ) forming together a number of pairs each including a locking pin ( 6 ) and a key follower ( 4 ) and having toothings ( 7 , 5 ) intended to mutually cooperate, in different relative positions, in order to define a lock codification, the cylindrical rotor ( 2 ) including a transversally displaceable stop bar ( 9 ) cooperating with a longitudinal groove ( 10 ) of the stator ( 1 ) and having projections susceptible of cooperating with notches of the locking pins ( 6 ) in order to immobilize the locking pins ( 6 ) when the cylindrical rotor ( 2 ) is made to rotate within the stator ( 1 ) and the stop bar ( 9 ) comes out of said groove ( 10 ) and engages the locking pins ( 6 ), and comprising a change bar ( 11 ) which is transversally displaceable and is slidingly coupled with the key followers ( 4 ) in order to normally keep the key followers ( 4 ) engaged with the locking pins ( 6 ) and to disengage the key followers ( 4 ) from the locking pins ( 6 ) when said change bar ( 11 ) comes into said groove ( 10 ) of the stator ( 1 ) and provides a lock programming position, characterized in that one of the lock blocking members ( 4 , 6 ), which compose at least some of the pairs each including a locking pin ( 6 ) and a key follower ( 4 ), are provided with two parallel and adjacent toothings ( 7 a , 7 b ), each toothing ( 7 a , 7 b ) having its pitch phase displaced with respect to the pitch phase of the other toothing ( 7 b , 7 a ), and in that at least one of said lock blocking members ( 4 , 6 ), which compose a pair including a locking pin ( 6 ) and a key follower ( 4 ), has a limited mobility along the direction of the axis of cylindrical rotor ( 2 ), whereby a lock blocking member ( 4 or 6 ) is allowed to displace in such a way that a mutual engagement between the lock blocking members ( 4 , 6 ) may take place into one or the other of said two toothings ( 7 a , 7 b ) of one of the lock blocking members ( 4 , 6 ) forming the pair.