A key or key blank includes a key blade having a first edge, a second edge, and first and second opposed sides. The first edge has one or more edge bittings to elevate and/or rotate one or more tumbler pins of a lock with a vertically-oriented keyway, and one of the opposed sides has one or more side bittings to elevate and/or rotate one or more tumbler pins of a lock with a horizontally-oriented keyway. Side warding surfaces on the key blank are shaped and positioned to minimize the interference of peaks between the skewed bitting cuts on the key. A lock has a keyway configured for the key having edge bittings to elevate and/or rotate one or more tumbler pins of a vertical lock and side bittings to elevate and/or rotate one or more tumbler pins of a horizontal lock.

A trapped key interlock system is disclosed. A pair of hollow tubular casings located one inside the other and each having a series of elongate slots are used. When the lock is in a locked condition the elongate slots are aligned as inner and outer pairs with engaging members extending through the pairs of slots is preventing rotational movement of the tubular casings relative to each other. The engaging members are biased towards this locked condition. On insertion of the correctly coded key the engaging members are caused to move against the biasing force out of engagement with the slots in the outer tubular casing thereby allowing the inner tubular casing to rotate relative to the outer tubular casing and moving the lock to an unlocked condition.

The invention relates to a flat key (1) for a cylinder lock (11), said flat key comprising: a key bow (2) and a key shaft (3) that extends substantially parallel to a key longitudinal axis (L) and has a key tip (4), wherein at least one surface coding (6) designed to be read in the cylinder lock (11) is located at the end face (5) of the key tip (4); and a cylinder lock (11) for receiving such a flat key (1), and a locking system comprising one or more such flat keys (1) in combination with one or more such cylinder locks (11).

A key including at least one coding cavity (55) defining a hollow geometry for coding the key. The geometry includes at least one internal undercut (60a, 60b). The lock for validating a key comprises blocking means (21, 22) coupled to a driving part (14) and validating means (25, 26) which are coupled to the blocking means so as to change the state of the blocking means when the key used with the lock has a correct coding. The validating means (25, 26) protrude at least partially into the key cavity of the lock in order to introduce the validating means at least partially into the coding cavity (55) of the key and to sense the inner face of the coding cavity.

A key or key blank includes a key blade having a first edge, a second edge, and first and second opposed sides. The first edge has one or more edge bittings to elevate and/or rotate one or more tumbler pins of a lock with a vertically-oriented keyway, and one of the opposed sides has one or more side bittings to elevate and/or rotate one or more tumbler pins of a lock with a horizontally-oriented keyway. Side warding surfaces on the key blank are shaped and positioned to minimize the interference of peaks between the skewed bitting cuts on the key. A lock has a keyway configured for the key having edge bittings to elevate and/or rotate one or more tumbler pins of a vertical lock and side bittings to elevate and/or rotate one or more tumbler pins of a horizontal lock.

Provided is a locking device that allows a plurality of cylinder locks having different security levels to be locked and unlocked with the same unlocking key. A locking device comprising: a cylinder lock having an outer cylinder, and an inner cylinder that is rotatably fit with the outer cylinder; and an unlocking key corresponding to a key hole formed in the inner cylinder, wherein a projecting part is formed at the back end of the key hole, and a positioning recess part that can be fit with the projecting part is formed at the front end of the unlocking key.

A lock (1) is described, comprising: a body (2) suitable to define a housing (3) having a longitudinal development direction (L) along an insertion direction (I) of a key (200), said housing (3) comprising a first portion (4) and a second portion (5) mutually adjacent along the longitudinal development direction (L) of the body (2); a first rotor (37) suitable to be rotationally housed within the first portion (4) of said housing (3) of such body (2) about the longitudinal development direction (L) of the body (2), said first rotor (37) being suitable to define a further housing (38); a second rotor (39) comprising a first portion (55) suitable to be rotationally housed within the second portion (5) of said housing (3) of the body (2) about the longitudinal development direction (L) of such body (2), said second rotor (39) comprising a second portion (56) suitable to be rotationally housed within the further housing (38) defined by the first rotor (37) about the longitudinal development direction (L) of such body (2). The second rotor (39), by the insertion of the key (200), is suitable to translate along the longitudinal development direction (L) of the body (2) with respect to the first rotor (37). The second rotor (39), by a first rotation portion of the key (200), is suitable to rotate about the longitudinal development direction (L) of the body (2) with respect to the first rotor (37), to pass from a disengagement position to an engagement position with said first rotor (37). In the engagement position, said first rotor (37) and said second rotor (39), by a second portion of rotation of the key (200), are suitable to integrally translate along the longitudinal development direction (L) of the body (2) to reach an actuating position of the lock (1).

A lock set comprising a cylinder lock having a stator and a rotatable member rotatable in the stator and having a key slot and at least one side; a security element with protrusions, pivotally connected to the rotatable member; and one or more fitting keys, each having one or more recesses and one or more extensible members. The distances between the protrusions of the security element correspond to locations of the recess(es) and extendible member(s) of the fitting key for engagement therewith, such that using the fitting key will have the security element positioned in a non-obstructing position allowing free rotation of the rotatable member in the stator and using an unfitting key will cause a portion of the security element to protrude from the outer wall of the rotatable member engaging the inner wall of the stator thereby preventing rotation of the rotatable member in the stator.

The present invention provides a key blank and a key set. The key blank includes one or more telescopic members inserted through corresponding one or more channels of the key shank for fitting to release a security mechanism of a lock unit. The lock set has one or more fitting keys and a lock unit including: a stator; a rotor; a first locking mechanism; and an additional security mechanism including one or more wafer units. The key shank has one or more telescopic members each inserted in a channel perforated in the key shank. The wafer unit of the security mechanism is located and configured for engaging an edge of the telescopic member when the fitting key is used, such that each telescopic member will move the respective wafer unit it engages for releasing the additional security mechanism for allowing the rotor to rotate in the stator.

A cylinder lock assembly includes a plug rotatable in a cylinder lock body. The plug includes chambers, each of which has a chamber depth axis. A plurality of thin, planar plug locking elements are received in the chambers. Each plug locking element has a key cut interface probe for interfacing with a key cut formed on a key. Each plug locking element is arranged to move along the chamber depth axis and does not rotate about the chamber depth axis. Each key cut interface probe has a predetermined orientation with respect to the chamber depth axis.