A cylinder lock includes tumbler pin assemblies and a secondary locking element associated with at least one of the pin assemblies. The secondary locking element is biased outwardly to engage a locking feature formed in the bore of the housing to prevent the plug from rotating within the bore. A portion of the associated primary pin assembly extends through the secondary locking element and into the keyway and is movable independently of the secondary locking element. The secondary locking element includes at least one control feature that is directly or indirectly engaged by a key inserted into the keyway to cause the secondary locking element to move inwardly toward the plug so that the secondary locking element disengages from the locking feature or to permit the secondary locking element to be moved inwardly toward the plug so that the secondary locking element can disengage from the locking feature.

A cylinder lock includes tumbler pin assemblies and a secondary locking element associated with at least one of the pin assemblies. The secondary locking element is biased outwardly to engage a locking feature formed in the bore of the housing to prevent the plug from rotating within the bore. A portion of the associated primary pin assembly extends through the secondary locking element and into the keyway and is movable independently of the secondary locking element. The secondary locking element includes at least one control feature that is directly or indirectly engaged by a key inserted into the keyway to cause the secondary locking element to move inwardly toward the plug so that the secondary locking element disengages from the locking feature or to permit the secondary locking element to be moved inwardly toward the plug so that the secondary locking element can disengage from the locking feature.

A lock core includes a shell, a plug within and rotatable relative to the shell between a first position and a second position about a longitudinal axis of the plug, and a lock. The lock has a first locked position preventing rotation of the plug relative to the shell, an unlocked position allowing rotation of the plug relative to the shell and a second locked position different from the first locked position preventing rotation of the plug relative to the shell. The lock is moveable from the first locked position preventing rotation of the plug relative to the shell to the unlocked position with a first movement of the lock, the first movement having a vector component along the longitudinal axis of the plug and a vector component along an axis transverse to the longitudinal axis of the plug

A lock core includes a shell, a plug within and rotatable relative to the shell between a first position and a second position about a longitudinal axis of the plug, and a lock. The lock has a first locked position preventing rotation of the plug relative to the shell, an unlocked position allowing rotation of the plug relative to the shell and a second locked position different from the first locked position preventing rotation of the plug relative to the shell. The lock is moveable from the first locked position preventing rotation of the plug relative to the shell to the unlocked position with a first movement of the lock, the first movement having a vector component along the longitudinal axis of the plug and a vector component along an axis transverse to the longitudinal axis of the plug

A key element having a flat key with a key head and a key shank which extends along a key axis from the key head to a front key tip and has two parallel flat sides and two mutually opposing narrow sides. On at least one of the flat sides, an inlet groove extending from the key tip in parallel with the key axis is provided which has a non-constant depth along its axial extent. The inlet groove can have a first depth, in particular in an entry region, and a second, greater depth in a coding region remote from the key tip. The inlet groove is undercut, as a result of which an expanded sensing head of a block tumbler can engage therein.

A key element having a flat key with a key head and a key shank which extends along a key axis from the key head to a front key tip and has two parallel flat sides and two mutually opposing narrow sides. On at least one of the flat sides, an inlet groove extending from the key tip in parallel with the key axis is provided which has a non-constant depth along its axial extent. The inlet groove can have a first depth, in particular in an entry region, and a second, greater depth in a coding region remote from the key tip. The inlet groove is undercut, as a result of which an expanded sensing head of a block tumbler can engage therein.

A lock and key and method of forming same are disclosed. The lock includes a cylinder and a plug which has a keyway for receiving a key. The plug is moveable (rotatable) relative to the cylinder. There are multiple pins slidable within the plug and the pins have a first recess with a cam surface for engaging a key so as to cause sliding movement and a second recess for receiving a locking member. The locking member allows and prevents the rotation of the plug in the cylinder only allowing rotation when all of the first recesses are aligned with the locking member. The key has a head and a blade with the blade having multiple peg receivers with a plurality of peg locations in each receiver. Each peg location has a peg fixed into one of the peg receiver and the pegs move the pins to determine whether the lock can be opened.

A lock and key and method of forming same are disclosed. The lock includes a cylinder and a plug which has a keyway for receiving a key. The plug is moveable (rotatable) relative to the cylinder. There are multiple pins slidable within the plug and the pins have a first recess with a cam surface for engaging a key so as to cause sliding movement and a second recess for receiving a locking member. The locking member allows and prevents the rotation of the plug in the cylinder only allowing rotation when all of the first recesses are aligned with the locking member. The key has a head and a blade with the blade having multiple peg receivers with a plurality of peg locations in each receiver. Each peg location has a peg fixed into one of the peg receiver and the pegs move the pins to determine whether the lock can be opened.

A key element having a flat key with a key head and a key shank which extends along a key axis from the key head to a front key tip and has two parallel flat sides and two mutually opposing narrow sides. On at least one of the flat sides, an inlet groove extending from the key tip in parallel with the key axis is provided which has a non-constant depth along its axial extent. The inlet groove can have a first depth, in particular in an entry region, and a second, greater depth in a coding region remote from the key tip. The inlet groove is undercut, as a result of which an expanded sensing head of a block tumbler can engage therein.

A key element having a flat key with a key head and a key shank which extends along a key axis from the key head to a front key tip and has two parallel flat sides and two mutually opposing narrow sides. On at least one of the flat sides, an inlet groove extending from the key tip in parallel with the key axis is provided which has a non-constant depth along its axial extent. The inlet groove can have a first depth, in particular in an entry region, and a second, greater depth in a coding region remote from the key tip. The inlet groove is undercut, as a result of which an expanded sensing head of a block tumbler can engage therein.