A lock and key combination providing extra code combinations. The lock has a housing and a cylindrical key plug with a keyway and at least side locking tumbler. The side locking tumbler has, at its rear side, a tongue which will fit into an associated recess in a side bar. The outer surface of the tongue is shaped as a groove between two vertical edge portions. One of these edge portions will make contact with the sidebar, adjacent to an entrance opening of the recess in the sidebar and thereby stop the tongue from entering into the rectangular recess if the side locking tumbler is rotationally misaligned. Because of this, it is possible to design the cylinder lock with a large number of predetermined code positions for each side locking tumbler. An associated key with a key blade having a wave-like side code pattern, will have, for each side locking tumbler, a selected one of a large number of predetermined different code positions.

A high security locking system comprising a deviated key and a lock housing. The lock housing may further comprise a face plate with a keyhole for receiving the deviated key and first pin slots disposed within the lock housing. The high security locking system may comprise a lock cylinder disposed within the lock housing and include second pin slots disposed within the lock cylinder. An idler block may be disposed within the lock cylinder and may be rotatable, which may allow the deviated key to align with one or more of the second pin slots in the lock cylinder. Additionally, a stationary block may be disposed within the lock cylinder and the deviated key may rotate around the lock without interfering with the stationary block.

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.

An anti-lock picking lock device is provided. The lock device features a locking cylinder having an opening configured to receive a drawer. The drawer having a keyway slot on its top surface and is configured to receive a similar shaped key. The drawer is enabled to slide within the clocking cylinder during use. In one position, the keyway slot is not exposed and occluded from any type of tampering. In another positon, the drawer is extended, either manually or via an electronic device, making the keyway slot accessible for operation.

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.

A lock includes a housing, a cylindrical core body and a tumbler unit. The core body is rotatably mounted in the housing, and includes a core axle, and a core tube sleeved on the core axle. The core axle has a helical keyway. The tumbler unit includes a housing pin hole formed in the housing, a tube through hole formed through the core tube, a pin assembly movably mounted in the housing pin hole and the tube through hole, a hole-defining surface defining the tube through hole and having a shoulder surface portion, and a resilient member disposed in the housing and resiliently biasing the pin assembly to abut against the shoulder surface portion and extend into the helical keyway.

Locking systems allow for the unlocking and locking of, e.g., doors, containers, and enclosures. Lock cylinders are coded to specific keys, and often there is a desire to have a key be able to access a subset of lock cylinders. Keys are coded using bitting to gain access to specific lock cylinders. It is with respect to these and other general considerations that embodiments have been described.

An anti-theft structure composed of a lock core composed of a lock core seat, a lock core shell, a push plate provided in a slide groove of the lock core shell, lock plates and washers alternately superimposedly provided in the lock core shell, a limiting plate and a positioning plate disposed on the lock core shell and placed in the lock core seat together with the shell, a latch lever, a brake bolt plate provided in an accommodating groove of the lock core seat, a compression spring provided in a groove of the lock core seat and pushing against the brake bolt plate, a positioning baffle provided in an accommodating chamber of the lock core seat and located at a bottom of the lock core shell, and a retaining ring embedded in a ring groove of the lock core seat; and a key provided with a ring groove.

A lock comprises: a body with a housing comprising a first and a second portion mutually adjacent along an longitudinal development direction corresponding to an insertion direction of a key; a first rotor with a further housing, rotationally housed within the first portion of the housing of the body; a second rotor comprising a first portion rotationally housed within the second portion of the housing of the body; a second portion rotationally housed within the further housing of the first rotor. The second rotor, inserting the key, translates along the longitudinal development direction of the body with respect to the first rotor and, by a first rotation portion of the key, rotates with respect to the first rotor, passing from disengaging to engaging the first rotor, wherein the first rotor and the second rotor, by a second portion of rotation of the key, integrally translate to actuate the lock.