Patent ID: 7874191
Filing Date: 2011-01-25
Classification: E05B,Y10T

Abstract:
1. A re-keyable cylinder lock comprising: a plug including a key hole, and a plurality of tumbler pieces each having toothed parts, the tumbler pieces being movable in a direction transverse to a longitudinal axis of the plug when a key is inserted into the key hole; and a re-keying unit that has a plurality of gear wheels each of which is engaged with one of the toothed parts, each of the gear wheels being rotatable by a respective one of the tumbler pieces about an axis of rotation substantially parallel to the longitudinal axis of the plug when the key is inserted into the key hole, wherein each of the gear wheels disengages from a respective one of the toothed parts when moving transversely of the longitudinal axis in a direction away from the toothed parts and substantially perpendicular to the direction that the tumbler pieces move.