Kaba High Security Locks Corporation

John C Bergstrom

Thomas J Divito

Raymond Aldieri

Jerome V Andrews

A rekeyable look includes at least one chamber housing a tumbler pin stack having a master pin disposed between the driver pin and the bottom pin. The bitting of a change code key inserted in the keyway displaces the tumbler pin stack containing the master pin such that the interface between the master pin and the bottom pin is placed on the shear line defined by the cylinder shell and plug. Rotation of the change code key aligns a first slot on the change code key with the master pin wherein the master pin is received by the first slot. The master pin is carried with the change code key on removal of the key from the keyway. A replacement master pin disposed in the first slot is inserted into the keyway with the change code key. Rotation of the change code key aligns the replacement master pin with the drive pin. Inserting a control slide in a second slot in the change code key biases the replacement master pin and drive pin wherein the interface between the control slide and replacement master pin is placed on the shear line. The replacement master pin is captured in the chamber upon rotation and removal of the change code key and control slide.

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Burlington, CT, United States of America

John C Bergstrom