Patent ID: 7181937
Filing Date: 2007-02-27
Classification: E05B,Y10T

Abstract:
1. Locking system including a standard key, and at least one change key and a locking cylinder having pin tumblers, in which a basic code can be changed using the at least one change key, said locking cylinder having a cylinder housing in which a rotor is mounted which has a keyway into which a shank of said standard key which is provided with control surfaces can be pushed in order to position the pin tumblers which are arranged in three first rows of bores, and further having three second rows of tumblers which have coding elements and which are arranged in further bores in the cylinder housing in a programming position of the rotor, wherein said at least one change key interacts with said three second rows of tumblers in the programming position, said tumblers of said second rows being arranged in slides, wherein said second rows each contain tumblers having coding elements.