A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

Blocking devices to stop movement of mechanical or magnetic coded rotors, pins or discs immediately when the plug is turned.

The key (1) for a lock (2), comprises at least a lever (9) having a first arm (10) for starting movement and a second arm (11) for activating a tumbler element of the lock (2), the lever (9) being pivoted to the shaft (4) of the key (1) with an oscillating axis thereof being transversal to the longitudinal axis of the shaft (4) of the key (1), the first lever arm (10) and the second lever arm (11) being located on a same face (5) of the shaft (4) of the key (1).

An exemplary lock cylinder includes a shell, a plug positioned in the shell, and a locking assembly. The locking assembly is configured to prevent rotation of the plug when no key is inserted, and to permit rotation of the plug upon insertion of any of a plurality of keys having different bitting profiles. The locking assembly may further be configured to prevent key extraction when the plug is in a rotated position.

A key device includes a generally elongate shaft portion that has first and second oppositely directed side surfaces, at least one of which is cuttable to form key cuts that define a key combination surface. First and second key combination elements, disposed in the elongate shaft portion, are side-by-side one another at different lateral positions along the width of the elongate shaft portion and located at overlapping longitudinal positions along the length of the elongate shaft portion. The first and second key combination elements are each pivotable about a pivot axis.

A locking system has a lock cylinder rotatable within a lock housing and a side bar movable relative to channels within the lock cylinder and lock housing between locked and released conditions of the lock cylinder. An idler block within the lock cylinder has a key channel receiving a key therein so that the key and idler block rotate together relative to the lock cylinder. Annular detainer discs are received between the idler block and the lock cylinder, each having an outer gate channel and an inner key bit such that keyed surfaces of the key engage the key bits when rotated to align the gate channels with the side bar and enable the release of the side bar to unlock the cylinder relative to the housing. A stationary shield may be fixed relative to the housing, about which the idler block rotates to restrict access to the detainer discs.

The locking device includes a key having a cylindrical shaft in which a guide groove is formed in the axial direction, and a cylinder lock which includes an outer cylinder, an inner cylinder, a locking bar and a tumbler, the inner cylinder has an inner cylinder main body rotatably accommodated in the outer cylinder, a rod fixed to the inner cylinder main body, and a key insertion slot, the locking bar is interposed between the inner cylinder main body and the outer cylinder and prevents the rotation of the inner cylinder by engaging and disengagingly locking the inner cylinder main body and the outer cylinder, and the tumbler has a guide convex portion engageably and detachably engaged with the key groove, and an inner concave portion rotatably received in the inner cylinder and dropping the locking bar.

A cylinder lock and key combination with a key slot and at least one dual tumbler assembly for locking a key plug against rotation. The dual tumbler assembly includes an outer pin movable elevationally in a chamber in the key plug, and an inner pin movable telescopically in a cylindrical bore in the outer pin. The outer pin is provided with at least one key contacting end portion for engagement with a first code portion of a key blade upon insertion thereof in the key slot. The inner pin is provided with at least one key contacting end portion, for engagement with a second code portion of the key blade. The key contacting end portions of the outer and inner pins of the tumbler assembly are located adjacent to each other at axially and radially well-defined code positions relative to a center-line of the tumbler assembly.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

A cylinder lock and an associated key, the lock including a fixed body and a plug which is accommodated within a respective cavity of the body and can rotate with respect to the body. The plug includes a substantially longitudinal compartment for the functional accommodation of a key which includes a grip portion from which an elongated body extends and which is provided with coding grooves and protrusions on its outer surface. Between the plug and the body are respective accommodation channels for translating coding elements, which open onto the substantially longitudinal compartment. The plug includes at least one auxiliary duct which faces the substantially longitudinal compartment and extends at least partially in the body for the sliding accommodation of at least one coding unit that includes at least one pin and at least one conical portion.