A lock system may comprise a lock operating key for operating a lock, with the key including a bow and a blade extending from the bow along a longitudinal axis of the blade. The blade may include a blade wall with an arcuate main wall portion and a pair of side wall portions extending radially inward from opposite sides of the main wall portion. Bitting may be formed on the blade and be positioned on at least one of the side wall portions of the blade wall. The lock system may also include a lock plug defining a keyway having a transverse keyway profile configured to receive the blade of the key, with at least a portion of the keyway having an arcuate shape to receive the arcuate main wall portion of the blade wall of the key.

A tamper-resistant lock assembly comprising a plate having a slot for receiving a key, the slot extending through the plate from an opening in a front face thereof to an exit in an opposing rear face thereof, the opening having a first profile and the exit having a second, different profile, the key comprising a shaft having a bit extending therefrom, the bit being formed of a shape memory material and being pre-configured such that its cross-sectional shape in its temporary form matches the first profile and the bit can be inserted through the slot via the opening and, upon application of a predetermined external stimulus, returns to a permanent form in which its cross-sectional shape matches the second profile and the bit can be retracted from the slot via the exit.

The invention relates to a flat key profile for a lock and key system in which a key channel corresponding to the key profile is provided in the lock cylinder. In this case, the key profile of the key shank facing the key back upper profile section and a key face facing the lower profile section, wherein in the lower profile section in a side surface of the key shank a triangular, the center plane of the key shank superior, paracentric profile groove (2) provided on the opposite side surface of the key shank one above or below the opposite paracentric profile groove (2) arranged, triangular profile groove (3; 4) is provided, the arrangement of the paracentric profile groove relative to the opposite profile groove is such that an imaginary line (7), the vertical to the keychain plane from the intersection of the upper or lower leg of the paracentric profile groove with the key side surface to the opposite profile groove extends, to an imaginary line (5) extending from the intersection of the upper or lower leg of the opposite profile groove with the key side surface extends to the paracentric profile groove, a vertical distance (9).

A locking system has a lock housing having first pin slots, a lock cylinder having second pin slots and being supported within the lock housing such that rotation of the lock cylinder is dependent upon a position of tumbler pins within the pin slots, and an idler block defining a keyway to receive a deviated key in which the idler block is rotatable relative to the lock cylinder between an entry position and a pin position aligning the key with the pin slots. One or more translating shields in the idler block are movable from an open position in which the keyway is unobstructed by the shield to allow for insertion or removal of the deviated key and a closed position in which the translating shield protrudes at least partway into a path of the keyway without interfering with rotation of the deviated key with the idler block.

A tamper-resistant lock assembly comprising a plate having a slot for receiving a key, the slot extending through the plate from an opening in a front face thereof to an exit in an opposing rear face thereof, the opening having a first profile and the exit having a second, different profile, the key comprising a shaft having a bit extending therefrom, the bit being formed of a shape memory material and being pre-configured such that its cross-sectional shape in its temporary form matches the first profile and the bit can be inserted through the slot via the opening and, upon application of a predetermined external stimulus, returns to a permanent form in which its cross-sectional shape matches the second profile and the bit can be retracted from the slot via the exit.

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.

Cylindrical locks and more specifically a set of profile members in combination with a rotatable cylindrical key plug have a longitudinal keyway with a profile corresponding to an associated key. Each profile member is accommodated in an associated cavity in the key plug at a lateral side of the keyway so as to form a lateral part thereof. The profile members have a non-circular cross-section and are non-rotatably mounted in the associated cavities at a location adjacent to the keyway. A portion of each profile member has a profiled surface portion facing inwards toward the opposite lateral side of the keyway, the profiled surface portion having, in a plane being transversal to a longitudinal axis of the key plug, a specific profile section defining a local, lateral part of the keyway. An associated key, and a method to manufacture a cylindrical key plug with such profile members are also disclosed.

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 key, comprising: a key head; and a key shank (10), characterized in that the key shank (10) includes a torsion section (20) that is formed, in particular cold formed, along a longitudinal axis (L) at least in sections, wherein the key shank (10) includes a base cross-section (26) in a transition portion to the torsion section (20), wherein a cross-section (30) of the key shank (10) protrudes at least in sections beyond the base cross-section (26) in the torsion section (20) in a direction towards the key tip (70).

A system including a lock class having a plurality of lock families, with each lock family including a plurality of lock cylinders. Each of the lock families has a control pin location which is different from the control pin location of another of the lock families within the lock class. Each of the lock cylinders generally includes a shell, a plug rotatably mounted in the shell, and a control ring rotatably mounted on the plug at the control pin location of the lock family of which the lock cylinder is a member, and a control pin operable to selectively couple the plug with the control ring. Each lock family may be associated with a control key family. Each control key family may include a plurality of control keys, each of which may have a control bitting configured to urge control pins of the associated lock family to a coupling position.