Locking system

A key or key blank for use in a locking system having a lock cylinder (15) which has a cylinder core (17) which is journalled in a housing (16) and has a keyway (21) for the introduction of the key (1),

• wherein a plurality of tumblers (31, 33) actuable by the key (1) and an additional blocking element (27) movably arranged in a guide passage (25) of the cylinder core (17) and displaceable obliquely or transversely to the direction of insertion of the key (1) projects into the keyway (21), wherein the additional blocking element (27) is made to cooperate with a counter-element (9, 10, 47) arranged at the key blade (3) with a key (1) introduced up to a maximum insertion depth, and wherein the counter-element (9, 10, 47) is completely arranged in a groove (7) or recess (45) extending in the longitudinal direction of the key blade (3) and starting from the key tip (5),
• characterized in that
• an elevated portion (9, 47) or a depression (10) is completely arranged in a groove (7) or in a recess (45) starting from the key tip and extending in the longitudinal direction of the key blade.

A set of keys or key blanks comprising a plurality of keys or key blanks of the same type, each key or key blank being for use in a locking system having a lock cylinder (15) which has a cylinder core (17) which is journalled in a housing (16) and has a keyway (21) for the introduction of the key (1), wherein a plurality of tumblers (31, 33) actuable by the key (1) and an additional blocking element (27) movably arranged in a guide passage (25) of the cylinder core (17) and displaceable obliquely or transversely to the direction of insertion of the key (1) projects into the keyway (21), wherein the additional blocking element (27) is made to cooperate with a counter-element (9, 10, 47) arranged at the key blade (3) with a key (1) introduced up to a maximum insertion depth, wherein the counter-element (9, 10, 47) is completely arranged in a groove (7) or recess (45) extending in the longitudinal direction of the key blade (3) and starting from the key tip (5), and wherein an elevated portion (9, 47) or a depression (10) is completely arranged in a groove (7) or in a recess (45) starting from the key tip and extending in the longitudinal direction of the key blade

• characterized in that
• the elevated portions (9, 47) of different keys or key blanks of said set have different heights;

A set of keys or key blanks comprising a plurality of keys or key blanks of the same type, each key or key blank being for use in a locking system having a lock cylinder (15) which has a cylinder core (17) which is journalled in a housing (16) and has a keyway (21) for the introduction of the key (1), wherein a plurality of tumblers (31, 33) actuable by the key (1) and an additional blocking element (27) movably arranged in a guide passage (25) of the cylinder core (17) and displaceable obliquely or transversely to the direction of insertion of the key (1) projects into the keyway (21), wherein the additional blocking element (27) is made to cooperate with a counter-element (9, 10, 47) arranged at the key blade (3) with a key (1) introduced up to a maximum insertion depth, wherein the counter-element (9, 10, 47) is completely arranged in a groove (7) or recess (45) extending in the longitudinal direction of the key blade (3) and starting from the key tip (5), and wherein an elevated portion (9, 47) or a depression (10) is completely arranged in a groove (7) or in a recess (45) starting from the key tip and extending in the longitudinal direction of the key blade,

• characterized in that the elevated portions of different keys or key blanks of said set are received at different positions in the groove (7) or in the recess (45).

A set of keys or key blanks comprising a plurality of keys or key blanks of the same type, each key or key blank being for use in a locking system having a lock cylinder (15) which has a cylinder core (17) which is journalled in a housing (16) and has a keyway (21) for the introduction of the key (1), wherein a plurality of tumblers (31, 33) actuable by the key (1) and an additional blocking element (27) movably arranged in a guide passage (25) of the cylinder core (17) and displaceable obliquely or transversely to the direction of insertion of the key (1) projects into the keyway (21), wherein the additional blocking element (27) is made to cooperate with a counter-element (9, 10, 47) arranged at the key blade (3) with a key (1) introduced up to a maximum insertion depth, wherein the counter-element (9, 10, 47) is completely arranged in a groove (7) or recess (45) extending in the longitudinal direction of the key blade (3) and starting from the key tip (5), and wherein an elevated portion (9, 47) or a depression (10) is completely arranged in a groove (7) or in a recess (45) starting from the key tip and extending in the longitudinal direction of the key blade,

• characterized in that the depressions (10) of different keys or key blanks of said set have at least one of different depths and different shapes.

A set of keys or key blanks comprising a plurality of keys or key blanks of the same type, each key or key blank being for use in a locking system having a lock cylinder (15) which has a cylinder core (17) which is journalled in a housing (16) and has a keyway (21) for the introduction of the key (1), wherein a plurality of tumblers (31, 33) actuable by the key (1) and an additional blocking element (27) movably arranged in a guide passage (25) of the cylinder core (17) and displaceable obliquely or transversely to the direction of insertion of the key (1) projects into the keyway (21), wherein the additional blocking element (27) is made to cooperate with a counter-element (9, 10, 47) arranged at the key blade (3) with a key (1) introduced up to a maximum insertion depth, wherein the counter-element (9, 10, 47) is completely arranged in a groove (7) or recess (45) extending in the longitudinal direction of the key blade (3) and starting from the key tip (5), and wherein an elevated portion (9, 47) or a depression (10) is completely arranged in a groove (7) or in a recess (45) starting from the key tip and extending in the longitudinal direction of the key blade,

• characterized in that
• the depressions (10) of different keys or key blanks of said set are introduced at different positions into the groove (7) or into the recess (45).