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.
Claims20
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 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.
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, the liftbar further being radially slideable within an aperture in the housing to release the plurality of code blocks from the sidebar.
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 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.
Dependencies are inferred from the claim text.