Patent ID: 7526935

Claim:
A method for rekeying a rekeyable lock cylinder comprising: providing a rekeyable lock cylinder having a plug assembly and a plurality of lower pin sets disposed in the plug assembly, the plug assembly includes a plug body and a sliding block disposed in the plug body and able to axially move, wherein the sliding block has a keyhole defined therein and each of the lower pin set sets includes an upper locking piece and a lower locking piece engaging with the upper locking piece respectively; inserting a first user key into the keyhole of the sliding block; turning the first user key to rotate the plug assembly to a predetermined degree; pushing the first user key to move the sliding block from an original position to a rekeying position to disengage each of the upper locking pieces and each of the lower locking pieces; pulling out the first user key; inserting a second user key into the keyhole of the sliding block; and turning the second user key to restore the sliding block back to the original position so as to move each of the upper locking pieces back to engage with each of the lower locking pieces respectively.