Patent ID: 7377142

Claim:
A cylinder lock with a coded key for blocking a shaft of a steering wheel and protection of a motor vehicle from theft, the characteristics of which are that on a left end inside a housing ( 1 ) there is a sliding cylinder ( 4 ) adapted to receive a coded key ( 5 ), where the cylinder ( 4 ) comprises an outer protective covering ( 6 ) inside of which there is positioned a stator ( 7 ), the stator ( 7 ) housing a rotatable core ( 8 ) therein and the covering ( 6 ) and the stator ( 7 ) being interconnected by a pin ( 9 ), and a front side of the cylinder ( 4 ) being closed by a safety ring ( 10 ), characterized in that the housing ( 1 ), is fastened on a first bushing ( 2 ) placed on a shaft ( 3 ) of steering system, the cylinder ( 4 ) is axially housed by said housing ( 1 ) and includes an axially aligned slot ( 14 ) in which a peak portion of a pin ( 13 ) is placed and fastened in the housing ( 1 ), that on the core ( 8 ) of the cylinder ( 4 ) a second bushing ( 15 ) is placed on which there is an eccentric ring ( 17 ) having a truncated area ( 18 ), while on the second bushing ( 15 ) a spiral spring ( 20 ) is placed, that in the housing ( 1 ) along the eccentric ring ( 17 ) a pin ( 19 ) and an inductive switch ( 27 ) are transversely fastened, that inside the second bushing ( 15 ) a spiral spring ( 24 ) and a piston ( 25 ) are placed, that the peak of the piston ( 25 ) is fastened to a lower portion of a second piston ( 26 ) for locking and that an opposing free end of the second piston ( 26 ) is placed in an opening ( 28 ) formed in the bushing ( 2 ).