Patent ID: 8316676
Filing Date: 2012-11-27
Classification: E05B,Y10T

Abstract:
1. A re-keyable cylinder lock comprising: a lock housing defining a longitudinal axis and having a plug hole, a cavity communicated with said plug hole, and a guide hole communicated with said cavity, wherein said cavity interposes the guide hole and the plug hole; a plug disposed within said plug hole, and including a first tumbler piece that has a toothed part; a re-keying unit that has a gear wheel, and a gear holder holding said gear wheel, said gear wheel engaging releasably said toothed part and movable transversely of said longitudinal axis so as to engage and disengage from said toothed part; and a control member disposed inside said cavity to permit or restrict transverse movement of said re-keying unit, said control member being movable axially between a first position and a second position, said control member moving transversely to a third position when reaching said second position, said control member extending into said guide hole when moving to said third position; said gear wheel and said gear holder moving transversely away from said toothed part when said control member moves to said third position.