Patent ID: 7870771

Claim:
A lock device with a lock cylinder ( 50 ), which comprises of a stationary cylinder housing ( 51 ) and a cylinder core ( 52 ) rotatably supported therein, and with a key bit ( 10 . 1 , 10 . 2 , 10 . 3 ), which has an edge profile ( 17 ) and can be inserted into a keyway ( 53 ) in the cylinder core ( 52 ) in order to sort tumblers ( 41 , 42 ), which can move transversely to it, in the cross section of the cylinder core ( 52 ), where a pair of scanning points ( 15 , 16 ) for coding the key bit ( 10 . 1 , 10 . 2 , 10 . 3 ) is provided for each, tumbler ( 41 , 42 ) by means of a profiled recess ( 31 , 32 ), which extends in the longitudinal direction of the key bit ( 10 . 1 , 10 . 2 , 10 . 3 ), and a pair of cooperating scanning points ( 45 , 46 ) is provided on each tumbler ( 41 , 42 ) to provide a corresponding countercoding, wherein one ( 15 ) of the two scanning points ( 15 , 16 ) of a first recess ( 31 ) is located in one of the lateral surfaces ( 11 ) of the edge profile ( 17 ) of the key bit ( 10 . 2 ), while the other scanning point ( 16 ) of a second recess ( 32 ) is located in the adjacent lateral surface ( 12 ) of the edge profile ( 17 ); in that a web is left in the corner region ( 30 . 1 ) of the edge profile ( 17 ) of the key bit ( 10 . 1 , 10 . 2 , 10 . 3 ) located between the two recesses ( 31 , 32 ); in that the web acts as a code web ( 21 to 24 ), because opposite web flanks ( 25 . 3 , 26 . 3 ) of the code web ( 21 ) produce the pair of scanning points ( 15 , 16 ) of the key bit ( 10 . 1 , 10 . 2 ) that serves for coding; in that each of the tumblers ( 41 , 42 ) is provided with a cutout ( 40 ), which in use encloses the opposing web flanks ( 25 . 3 , 26 . 3 ) of the code web ( 21 to 24 ); and in that the lateral edges ( 43 , 44 ) of the cutout ( 40 ) constitute the cooperating scanning points ( 45 , 46 ) in the tumblers ( 41 , 42 ).