Patent ID: 8424349

Claim:
A recodeable lock comprising: a housing; a cylinder plug disposed within the housing; a plurality of wafer tumblers disposed within the cylinder plug and movable within the cylinder plug in response to insertion of an authorized key into the cylinder plug; a locking mechanism coupled with the cylinder plug, the locking mechanism comprising a plurality of code blocks, a sidebar, and a codebar releasably securing the plurality of code blocks to the sidebar, wherein insertion of the authorized key into the cylinder plug moves the plurality of wafer tumblers to a predetermined unlocking orientation, such that the plurality of code blocks permits disengagement of the sidebar from the housing for rotation of the cylinder plug and sidebar within the housing; and a liftbar disposed in the housing radially outward of the cylinder plug, the liftbar being configured to selectively engage a radially outward extending appendage of the codebar when the cylinder plug and sidebar are rotated to a recoding orientation, to release the plurality of code blocks from the sidebar; wherein the housing comprises a unitary circumferential wall defining a circumferential track axially positioned to receive the appendage of the codebar to permit greater than 180 degree rotation of the cylinder plug and sidebar with respect to the housing, the circumferential track including a circumferential slot extending through the circumferential wall, and an circumferential pocket disposed on an inner surface of the circumferential wall and axially aligned with the slot.