Patent ID: 7810364
Filing Date: 2010-10-12
Classification: E05B,Y10T

Abstract:
1. A key for use in a lock and key system having: a housing ( a cylindrical key plug ( said at least one aligned side locking tumbler ( said elevational movement being performed against the action of a force exerted along said chamber ( said rotational movement of the at least one aligned side locking tumbler corresponding to the associated finger ( said key ( a longitudinally extending key blade ( 102 ), which is insertable into said key slot ( 201 ) of the key plug of an associated lock, said key blade having a side material region at one side of said key blade defined upwardly by a longitudinally extending shelf surface, which is at least partially interrupted by a side code pattern cut into said material region so as to form a wave-like guiding surface ( said wave-like guiding surface ( characterized in that in addition to said number of vertical code levels for said at least one side code portion, there is a extra vertical code level substantially located at said shelf surface, a side code top segment ( 121 ) extending longitudinally a predetermined length at this extra vertical code level and representing an extra code for the corresponding at least one aligned side locking tumbler of the associated lock to be retained on said longitudinally extending side code top segment within said predetermined length, whereby the number of possible code combinations is increased.