Patent ID: 8166783
Filing Date: 2012-05-01
Classification: E05B,Y10T

Abstract:
1. A pin tumbler cylinder lock comprising: a shell having at least first and second shell channels; a plug disposed in the shell, the plug having at least first and second plug channels that align with the first and second shell channels along a shear line between the plug and the shell when the plug is in a locked condition; at least first and second tumbler pins disposed in the corresponding first and second plug channels; and at least first and second driver pins disposed in the corresponding first and second shell channels, such that at least the first driver pin extends into the first plug channel in a seated condition when the plug is in the locked condition, such that rotation of the plug with respect to the shell is blocked; wherein the plug is configured to receive a proper key along a key axis perpendicular to the plug channels, such that insertion of the proper key in the plug raises the tumbler pins and corresponding driver pins to align engagement of the tumbler pins and corresponding driver pins with the shear line; further wherein the first driver pin includes a main body portion having an outer diameter greater than a diameter of an axially outermost edge of the first plug channel, such that the main body portion of the first driver pin engages an outer surface of the plug spaced apart from the first plug channel, and an end portion stepped relative to the main body portion and having an outer diameter smaller than the outer edge diameter of the first plug channel, such that at least the first driver pin is separated from the first tumbler pin by an axial gap when the first driver pin is in the seated condition and the end portion of the first driver pin is separated from the outer edge of the first plug channel by a second gap.