Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0003—Details
  • E05B27/0017—Tumblers or pins
  • E05B27/0021—Tumblers or pins having movable parts
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0057—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance
  • E05B27/0067—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance whereby a small rotation without the correct key blocks further movement of a tumbler
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0057—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance
  • E05B27/0071—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance by means preventing opening by using the bump-technique

Definitions

• the present invention relates to an anti-intrusion cylinder for locks, particularly suitable to prevent intrusions comprising so-called lock picking (which consists in the selective movement of the pins by means of a picking tool in order to release them simultaneously) and/or so-called lock bumping (which consists in applying impulsive percussions to at least one part of such cylinder).
• lock picking which consists in the selective movement of the pins by means of a picking tool in order to release them simultaneously
• lock bumping which consists in applying impulsive percussions to at least one part of such cylinder.
• each channel of the stator faces and is aligned with the respective channel of the rotor when the cylinder is in the closed configuration (key not inserted or inserted but not rotated with respect to the insertion configuration).
• the key by way of its contoured (coded) profile, acts on the upper surface of the coding pins, lowering them and bringing the shear line that separates the bottom of the coding pin with the apex of the driver pin in perfect alignment with the shear line that is present between the rotor and the stator, which are substantially mutually uncoupled (when the key is inserted).
• the rotor (when the key is inserted, therefore with the coding pins lowered according to the coding) can be turned by turning the head of the key that protrudes from the cylinder: in this manner it is possible to open the lock.
• Intrusion operations that provide for lock picking actions consist in the constant application of a mechanical moment (in the direction of rotation that corresponds to opening) to the rotor, while the coding pins are moved with a picking tool, so as to arrange the shear line between such coding pins and the driver pins in alignment with the interface surface between the rotor and the stator, allowing the rotation of the rotor of the cylinder and accordingly the opening of the lock in which the cylinder is installed.
• Intrusion operations that provide for lock bumping actions consist in the constant application of a mechanical moment (in the direction of rotation that corresponds to opening) to the rotor by means of a key, which is not coded, of the same type as the one associated with a given cylinder (contoured by providing a succession of grooves with a depth equal to or greater than the maximum depth that is present in the original key) and in the rhythmic striking of the head that protrudes from the cylinder of such key with a means having a substantial mass.
• Striking the mass on the head of the key entails a small and very fast advancement of the key in the cylinder, with a consequent impulsive collision of the inclined surface of each one of the grooves against the head of the respective coding pin of the cylinder: as a consequence of this impact, the coding pin transfers the accumulated energy to the driver pin (since they are in mutual contact), which is propelled toward the bottom of the channel of the stator, compressing the spring or other elastic means.
• driver pins that are shaped appropriately in order to facilitate their misalignment and locking.
• driver pins constituted by a stem that has a smaller diameter than the diameter of the respective stator channel (the driver pin is accommodated in the respective channel with a predefined mechanical play) and provided with a larger head (by way of indication, with a diameter/space occupation that is complementary to those of the respective stator channel).
• the driver pins tend to tilt with respect to the channel within which they are contained by way of the mechanical play that exists between their stem and the accommodation channel. This inclination prevents the head of the driver pins (which has the same diameter, the same space occupations, as the channel) from retracting into the channel, keeping the rotor locked with respect to the stator.
• repetition of the lock picking and lock bumping attempts causes, after a certain time, a random condition of alignment that ensures the rotation of the rotor, with the consequent possibility to open the lock with which the cylinder is associated.
• the aim of the present invention is to solve the problems described above, by providing an anti-intrusion cylinder for locks that is highly secure against intrusions.
• an object of the invention is to devise an anti- intrusion cylinder for locks that hinders and renders ineffective lock picking actions.
• Another object of the invention is to devise an anti-intrusion cylinder for locks that hinders and renders ineffective lock bumping actions.
• an anti-intrusion cylinder for locks of the type comprising a stator provided with a substantially cylindrical longitudinal cavity for accommodating a rotor with a longitudinal recess for the insertion of a key, said rotor and said stator comprising a plurality of channels, which are substantially aligned and face each other when the cylinder is in the closed configuration, said channels accommodating respective coding pins, driver pins and optional elastic means preset to prevent the rotation of the rotor in the stator in the absence of the key in said longitudinal recess, characterized in that at least one of said driver pins comprises a stem, which is accommodated slidingly with mechanical play in the portion of the stator of a respective channel, said stem being provided with a mushroom-shaped tip that has a smaller diameter than said stem, said tip facing and
• Figure 1 is a front sectional view of the cylinder according to the invention with the key inserted in a first step of opening;
• Figure 2 is a front sectional view of the cylinder of Figure 1 in a partially rotated locking configuration
• Figure 3 is a front sectional view of the cylinder of Figure 1 in the inactive configuration
• Figure 4 is a sectional side view of the cylinder of Figure 1 in the inactive configuration
• Figure 5 is an enlarged-scale sectional front view of the cylinder of Figure 1 in a locking configuration
• Figure 6 is an enlarged-scale view of Figure 5.
• the numeral 1 generally designates an anti-intrusion cylinder for locks.
• the cylinder 1 comprises a stator 2 provided with a substantially cylindrical longitudinal cavity 3 for accommodating a rotor 4.
• the rotor 4 in turn is affected by a longitudinal recess 5 that is intended to accommodate a key 6: the insertion of the respective key 6 in the recess 5 causes the possibility to rotate the rotor 4 with respect to the stator 2, thus opening the lock with which the cylinder 1 is associated.
• the rotor 4 and the stator 2 comprise a plurality of channels 7, which are substantially aligned and face each other when the cylinder 1 is in the closed configuration.
• the channels 7 accommodate respective coding pins 8, driver pins 9 and optional elastic means 7a preset to prevent the rotation of the rotor 4 in the stator 2 in the absence of the key 6 in the longitudinal recess 5.
• At least one of the driver pins 9 can validly comprise a stem 10, which is accommodated slidingly with mechanical play in the portion of the stator 2 of a respective channel 7.
• the mechanical play that is present between the stem 10 and the respective channel 7 is such as to allow lateral translations of the stem 10 and slight inclinations thereof.
• the diameter of the stem 10 might be chosen between approximately half the diameter of the channel 7 and approximately 4/5 of the diameter of the channel 7.
• the use of diameters of the stem 10 with a different ratio with the diameter of the channel 7 within which the stem 10 is accommodated is not excluded.
• the stem 10 is provided, according to the invention, with a mushroom-shaped tip 1 1 that has a smaller diameter than the stem 10.
• the tip 1 1 faces and is proximate to the corresponding coding pin 8, in particular to the end face 12 of such coding pin 8.
• At least one contoured annular body 13, which has a diameter that is substantially similar to the diameter of the channel 7, is fitted with mechanical play on the mushroom-shaped tip 1 1.
• the mushroom-shaped tip 1 1 can validly comprise a stem 14, which has a first diameter with a value comprise between 1 /6 and 3/4 of the diameter of the channel 7, surmounted by a pad 15, which has a second diameter with a value comprised between 1/5 and 5/6 of the diameter of the channel 7.
• the mushroom-shaped tip 1 1 can be shaped like the head of a screw that is engaged axially on a respective driver pin 9, on a terminal front thereof.
• the contoured annular body 13 comprises an internal through opening 16, which has a larger diameter than the first diameter of the stem 14 and a smaller diameter than the second diameter of the pad 15.
• the maximum diameter of the pad 15 can also advantageously be smaller than the diameter of the through opening 16 of the contoured annular body 1 3, especially if the driver pin 9 is provided in one piece, comprising therein its tip 1 1 . In this manner it is possible to fit easily the contoured annular body 13 on the driver pin 9 (in particular on its tip 1 1 ).
• the contoured annular body 13 can move with respect to the mushroom-shaped tip 1 1 (although it remains in any case locked between the pad 15 and the top of the driver pin 9): in particular, it can perform translations, arranging itself according to various possible misalignments with respect to the condition of alignment and coaxiality, and rotations, tilting with respect to the axis of the stem 14.
• the combination of the translation and rotation movements ensures a considerably higher security level for the cylinder 1 according to the invention since, as will become apparent hereinafter, the annular body 13 can be locked between the rotor 4 and the stator 2 (in the case of intrusion attempts) according to an unlimited number of different configurations, preventing the fraudulent opening of such cylinder 1.
• contoured annular body 13 (fitted with a predefined mechanical play on the stem 14 of the mushroom-shaped tip 1 1) is locked between the pad 15, in an upward region, and the terminal front of the stem 1 1 , in a downward region.
• the locking of the contoured annular body 13 in this position is due to the fact that it is compressed between the driver pin 9 and the coding pin 8 and fitted on the terminal 1 1 .
• the internal through opening 16 of the contoured annular body 13 can comprise conveniently a first through hole 17 with a diameter that is complementary to the diameter of the pad 15 (in order to hinder the accidental extraction of the annular body 13 from the mushroom-shaped tip 1 1) and an external receptacle 18 that has a larger diameter than the pad 15; such receptacle 18 is suitable to accommodate temporarily such pad 15.
• the first through hole 17 has a diameter that is complementary to the diameter of the pad 15, it is understood that it has a size that is proximate to the diameter of the pad; substantially, it can be slightly smaller, equal or slightly larger (by way of indication, the diameter of the through hole 17 might correspond to the diameter of the pad 15 plus or minus 2 mm).
• contoured annular body 13 can have advantageously an external shape that is chosen preferably among cylindrical, toroidal, barrel-like, frustum-like, prism-like, truncated pyramid-like, droplet portion-like, and a combination thereof.
• the annular body 13 performs a different locking action in the case of intrusion attempts.
• a shape that has a curved or rounded outer contour (for example toroidal, barrel-like, droplet portion-like) in fact facilitates the annular body 13 in assuming inclined configurations (with respect to the mushroom- shaped tip 1 1 ) since the absence of edges allows easier rotary motions.
• the driver pin 9 also can have an outer shape that is chosen preferably among cylindrical, toroidal, barrel-like, frustum-like, prism-like, truncated pyramid-like, droplet portion-like and a combination thereof. The adoption of even different shapes is not excluded.
• the annular body 13 performs a different locking action in the case of intrusion attempts also for the driver pin 9, depending on the shape that will be selected.
• a shape that has a curved or rounded outer contour (for example toroidal, barrel-like, droplet portion-like) in fact facilitates the annular body 13 in assuming inclined configurations (with respect to the mushroom-like tip 1 1), since the absence of edges allows easier rotary motions.
• the contoured annular bodies 13 can be at least two in number, mutually stacked and fitted with mechanical play on the mushroom-shaped tip 1 1.
• At least one first contoured annular body 13 might also comprise a recess for the partial accommodation of at least one portion of at least one second contoured annular body 13, so that they can also assume a configuration for mutual coupling (and optional partial accommodation of one in the other).
• the presence of this recess in the first contoured body 13 and of the corresponding portion in the second contoured body 13 is in any case not necessary for the correct operation of the invention; the contoured bodies 13 might in fact have mutual abutments faces that are flat or shaped in a manner that is entirely independent of each other.
• the cylinder 1 according to the invention can achieve extremely high security standards when the presence is provided of a plurality (in particular at least two) of driver pins 9 provided with the stem 10 having a mushroom-shaped tip 1 1 (with a smaller diameter than the stem 10) and of at least one contoured annular body 13 fitted with mechanical play on the mushroom-shaped terminal 1 1 : such driver pins 9 according to the invention can be distributed effectively in different channels 7.
• Operation of the present invention is as follows. If the specific key 6 is used, it is easily possible to move the rotor 4 with respect to the stator 2 of the cylinder 1.
• the driver pin 9 provided with the mushroom-shaped tip 1 1 locks.
• the ill-intentioned individual applies a mechanical moment in order to impose a rotation of the rotor 4 and simultaneously acts with a picking tool on the coding pins 8 to lower them (aligning them with the shear line between the stator 2 and the rotor 4).
• the forced rotation of the rotor 4 entails a misalignment of the annular body 13 with respect to the driver pin 9 on which it is fitted, with the impossibility to lower further such driver pin 9 (as shown in the accompanying Figures 2, 5 and 6).
• the annular body 13 in fact always abuts with one of its surfaces against the longitudinal cavity 3, making impossible any further lowering of the driver pin 9 within the respective channel 7.
• This locked configuration of the annular body 13 (which prevents the disengagement of the rotor 4 from the stator 2) can be eliminated only by interrupting the application of the mechanical moment on the rotor 4.
• the interruption of the application of the mechanical moment entails that all the other coding pins 8 (already arranged in the open configuration by the ill-intentioned individual with the lock picking tool) return to the inactive configuration, thwarting all the diffraction steps that have already been performed.
• the present invention solves the problems described earlier, devising an anti-intrusion cylinder 1 for locks that has a high level of security against intrusions.
• the cylinder 1 according to the invention hinders and renders ineffective any lock picking actions.
• the cylinder 1 according to the invention hinders and renders ineffective also any lock bumping actions.
• the present invention allows to provide an anti-intrusion cylinder 1 for locks in a relatively simple manner and also with substantially low costs: these characteristics ensure the certain practical application of the present invention.
• the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

• Lock And Its Accessories (AREA)
• Manufacture Of Motors, Generators (AREA)
• Preventing Unauthorised Actuation Of Valves (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=56117918

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (10)

• 2016
  • 2016-04-13 WO PCT/IT2016/000093 patent/WO2017179077A1/en not_active Ceased
  • 2016-04-13 RU RU2018139689A patent/RU2692876C1/ru active
  • 2016-04-13 EP EP16728406.6A patent/EP3443186B1/de active Active
  • 2016-04-13 ES ES16728406T patent/ES2786674T3/es active Active
  • 2016-04-13 PT PT167284066T patent/PT3443186T/pt unknown
• 2018
  • 2018-11-12 ZA ZA2018/07580A patent/ZA201807580B/en unknown

Also Published As

Similar Documents

Legal Events