Cylinder lock
AssigneeMottura Serrature di Sicurezza S.p.A.
InventorSergio Mottura
Life of this patent
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Abstract
A cylinder lock comprises a cylinder (10) having a series of locking tumblers (16) which are rotatably mounted around respective axes. The introduction of the key causes rotation of each locking tumbler (16) to an operative position in which the tumblers enable the disengagement of a locking member (17) carried by the cylinder (10) from a seat formed in the stator (8) of the lock.
Claims7
Cylinder lock comprising a lock body or stator (8), a cylinder or rotor (10), rotatably mounted within the body (8) and having a passage for introduction of a key (3), and a plurality of locking tumblers (11) mounted within the cylinder (19) and having their axes arranged radially and provided for being engaged by a key having a predetermined profile in order to be arranged in a position in which they enable the free rotation of the cylinder (10) within the body (8),
- wherein each of said locking tumblers (16) is mounted within said cylinder (10) with the possibility to rotate around an axis of the tumbler, said lock further comprising:
- means provided on the key (3) and on said tumblers (16) cooperating with each other to cause rotation of each tumbler (16) around the axis of the tumbler, towards a predetermined operative position, upon introduction of the key (3) into the cylinder (10), and
- a locking member (17) carried by the cylinder (10) and biased by spring means (18) towards an extracted position in which the locking member engages a cooperating seat (19) within the body (8), said locking member (17) being free to be withdrawn to a position of disengagement from said seat (19) when the tumblers (16) are rotated to said operative position upon introduction of the key,
- wherein each of said locking tumblers (16) is mounted within said cylinder (10) at a fixed position along the tumbler axis,
- and in that said means for causing rotation of said tumblers (16) comprises at least one front finger (23) projecting from each locking tumbler (16) and offset relative to the tumbler axis, and at least one shaped continuous slot (23) formed on at least one face (6) of the key (3) and able to receive the offset fingers (23) of the tumblers (16).
Key for use in a cylinder lock of the type comprising a lock body or stator, a cylinder or rotor which is rotatably mounted within said stator and having a passage for introduction of the key, and a plurality of locking tumblers mounted within the cylinder and adapted to be engaged by the key when the latter is introduced into said passage in order to be arranged at positions where they enable a free rotation of the cylinder within the stator, said key having one end with an axial slot (29) within which there is arranged a ring (30) mounted with clearance on a transverse pin (31) and adapted to cooperate with an abutment pin (32) secured within the cylinder (10) and projecting into the passage (10) for the key, so as to push a further locking pin (33) carried by the cylinder towards a cylinder freeing position.
Dependencies are inferred from the claim text.