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US 8,424,349 B2Granted
Key cylinder lock arrangements
AssigneeMaster Lock Company LLC
InventorsJesse A. Marcelle, Dean A. Paulson
Life of this patent
Estimating the term…
Abstract
A recodeable lock includes a housing, a cylinder plug, a plurality of wafer tumblers, and a sidebar coupled with the cylinder plug. The sidebar is assembled with a plurality of code blocks and a codebar releasably securing the code blocks to the sidebar. A liftbar is disposed in the housing radially outward of the cylinder plug and is 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 code blocks from the sidebar. The housing includes 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.
Claims18
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.
4 more elements
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, an entirety of the liftbar further being radially slideable within an aperture in the housing to release the plurality of code blocks from the sidebar.
3 more elements
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;
- a spring loaded biasing member disposed in a radially extending hole in the housing for biasing the sidebar radially inward towards disengagement from 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.
4 more elements
Dependencies are inferred from the claim text.