METHOD AND APPARATUS FOR A REKEYABLE MASTER KEY LOCK

A rekeyable master lock includes a plurality of pin gears, with each pin gear engaged with a corresponding key follower. As each key follower rides up and down on the key biting, it causes a corresponding pin gear to rotate. Each pin gear engages a user gear and a master gear so that, as the pin gea...

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Bibliographische Detailangaben
1. Verfasser: EMORY, MARK W
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:A rekeyable master lock includes a plurality of pin gears, with each pin gear engaged with a corresponding key follower. As each key follower rides up and down on the key biting, it causes a corresponding pin gear to rotate. Each pin gear engages a user gear and a master gear so that, as the pin gear rotates, the user and master gears rotate. Each user and master gear, in turn, drives a corresponding user rack and a master rack. When a valid user key is inserted and rotated, the user racks or master racks are aligned along a common axis and held in alignment by a locking bar. Longitudinal movement of the user gear or master gear allows the rekeying function by decoupling and recoupling the user gear or master gear with the user racks or master racks.