WO2007085526A1 - Break-in resistant cylinder for locks - Google Patents

Break-in resistant cylinder for locks Download PDF

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Publication number
WO2007085526A1
WO2007085526A1 PCT/EP2007/050206 EP2007050206W WO2007085526A1 WO 2007085526 A1 WO2007085526 A1 WO 2007085526A1 EP 2007050206 W EP2007050206 W EP 2007050206W WO 2007085526 A1 WO2007085526 A1 WO 2007085526A1
Authority
WO
WIPO (PCT)
Prior art keywords
main body
rotor
stator
key
cylinder
Prior art date
Application number
PCT/EP2007/050206
Other languages
French (fr)
Inventor
Luciano Darchini
Fausto Fustini
Stefano Servadei
Original Assignee
Cisa S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cisa S.P.A. filed Critical Cisa S.P.A.
Publication of WO2007085526A1 publication Critical patent/WO2007085526A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0038—Operating or controlling locks or other fastening devices by electric or magnetic means using permanent magnets
    • E05B47/0044—Cylinder locks with magnetic tumblers
    • 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
    • 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

Definitions

  • the present invention relates to a break-in resistant cylinder for locks, particularly suitable to thwart break-in actions which comprise impulsive percussions on at least one portion of the cylinder.
  • Locks which comprise a cylinder (in which the opening key is to be inserted) provided with a stator and a rotor which are mutually coupled by means of several coding pins and tumbler pins which can slide within stator and rotor channels: each stator channel faces, and is aligned with, the respective rotor channel when the cylinder is in the closed configuration (the key is not inserted or is inserted but not rotated with respect to the insertion configuration).
  • An axially-acting elastic element is provided between the bottom of the stator channel and the lower surface of the tumbler pin and is designed to keep the tumbler pin spaced from such bottom, barring external actions which entail the lowering of the tumbler pin (for example the insertion of the key in the cylinder).
  • the key thanks to its contoured (coded) profile, acts on the upper surface of the coding pins, lowering them and placing the shear line which separates the bottom of the coding pin from the apex of the tumbler pin in perfect alignment with the shear line that is present between the rotor and the stator, which are substantially mutually disengaged (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, which protrudes from the cylinder: in this manner it is possible to open the lock.
  • a key of this type has to be shaped by providing a succession of grooves whose depth is equal to, or greater than, the maximum depth that is present in the original key (associated with the cylinder of interest) and possibly by removing a small part of material from the portion of the key that abuts against the front of the cylinder.
  • the break-in action consists in inserting the key in the cylinder, subjecting it to torque and rhythmically striking its protruding head with a means of substantial mass.
  • the percussion of 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 impact of the inclined surface of each 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 tumbler pin (since they rest against each other), which is propelled toward the bottom of the stator channel, compressing the spring or other elastic means.
  • the described break-in action is substantially applicable to all types of cylinder and is therefore extremely dangerous also in view of the fact that often it does not even leave marks which might indicate that tampering has occurred.
  • the aim of the present invention is to obviate the above-mentioned drawbacks and meet the mentioned requirements, by providing a break-in resistant cylinder for locks which cannot be opened with the described break-in method.
  • an object of the present invention is to provide a cylinder for locks which is simple, relatively easy to provide in practice, safe in use, effective in operation, and has a relatively low cost.
  • the present break-in resistant cylinder for locks of the type which comprises 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, channels for accommodating respective coding pins, tumbler pins and any elastic means designed to prevent the rotation of the rotor within the stator if the key is not present in said longitudinal recess, characterized in that at least one said coding pin is made substantially of ferromagnetic material and at least one said tumbler pin is constituted by at least one main body and at least one secondary pad, said main body being constituted substantially by a magnet and applying
  • Figure 1 is a sectional front view, taken along a transverse vertical plane, of a first embodiment of a cylinder according to the invention in the inactive configuration;
  • Figure 2 is a sectional front view, taken along a transverse vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted;
  • Figure 3 is a sectional front view, taken along a transverse vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key;
  • Figure 4 is a sectional side view, taken along a longitudinal vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted, and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key;
  • Figure 5 is a side view of the coding pin and of the tumbler pin of the first embodiment of a cylinder according to the invention;
  • Figure 6 is a sectional front view, taken along a transverse vertical plane, of a second embodiment of a cylinder according to the invention in the inactive configuration
  • Figure 7 is a sectional front view, taken along a transverse vertical plane, of the second embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted;
  • Figure 8 is a sectional front view, taken along a transverse vertical plane, of the second embodiment of a cylinder according to the invention, with the key, modified for break-in purposes, inserted, and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key;
  • Figure 9 is a sectional side view, taken along a longitudinal vertical plane, of the second embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted, and with the secondary pad in a lowered configuration as a consequence of the percussions applied to the key;
  • Figure 10 is a side view of the coding pin and of the tumbler pin of the second embodiment of a cylinder according to the invention. Ways of carrying out the Invention
  • the reference numeral 1 generally designates a break-in resistant cylinder for locks.
  • the cylinder 1 comprises a stator 2 which is provided with a substantially cylindrical longitudinal cavity 3 for accommodating a rotor 4.
  • the rotor 4 has a longitudinal recess 5, through which it is possible to insert a key 6.
  • 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) and are designed to accommodate respective coding pins 8, tumbler pins 9 and optional elastic means 7a.
  • the coding pins 8, the tumbler pins 9 and the elastic means 7a prevent the rotation of the rotor 4 within the stator 2 if the key 6 is not present in the longitudinal recess 5.
  • At least one coding pin 8 (among the ones comprised within the various channels 7) is substantially made of ferromagnetic material, and at least one tumbler pin 9 (the one that corresponds to the coding pin 8 made of ferromagnetic material) is constituted by at least one main body 10 and at least one secondary pad 11.
  • the main body 10 is constituted substantially by a magnet and therefore applies a magnetic attraction to the respective ferromagnetic coding pin 8.
  • the secondary pad 11 is made of nonmagnetic material and is not affected by any magnetic attraction or repulsion from the main body 10: in this manner, the movements of the pad 11 are affected only by any external actions (opening by means of the key 6 or break-in actions) and by the axial thrust applied by the elastic means 7a.
  • the pad 11 can be made of diamagnetic or paramagnetic material depending on the requirements of construction and application.
  • the pad 11 is constituted substantially by a magnet and is arranged so that the end surface 11a which faces the bottom 10b of the main body 10 has the opposite magnetic polarity with respect to the magnetic polarity of the bottom 10b, the end surface 11a and the bottom 10b applying a mutual repulsion.
  • the magnets that constitute substantially the main body 10 and the secondary pad 11 are obtained by permanently magnetizing ferromagnetic material.
  • the base 8a of the coding pin 8 is in close contact with the head 10a of the main body 10 due to the magnetic attraction, and the bottom 10b of the main body 10 is in close contact with the end surface 11 a of the secondary pad 11 due to the axial action of the elastic means 7a.
  • the main body 10 is partly contained within the stator channel 7 and partly contained within the rotor channel 4, preventing the rotation of the rotor 4 with respect to the stator 2 and therefore preventing opening.
  • the base 8a of the coding pin 8 is substantially always in close contact with the head 10a of the main body 10 due to the magnetic attraction (except possibly for the moment of the impulse) and the secondary pad 11 is propelled toward the bottom of the respective containment channel 7 and therefore separated from the bottom 10b of the main body 10, with consequent compression of the elastic means 7a.
  • the main body 10 remains partially inserted within the channel 7 of the stator 2 and in the channel 7 of the rotor 4, preventing mutual rotations for break-in purposes.

Landscapes

  • Lock And Its Accessories (AREA)
  • Springs (AREA)

Abstract

A break-in resistant cylinder (1) for locks, of the type which comprises a stator (2) provided with a substantially cylindrical longitudinal cavity (3) for accommodating a rotor (4) with a longitudinal recess (5) for the insertion of a key (6). 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, channels (7) for accommodating respective coding pins (8), tumbler pins (9) and any elastic means (7a) designed to prevent the rotation of the rotor (4) within the stator (2) if the key (6) is not present in the longitudinal recess (5). At least one coding pin (8) is made substantially of ferromagnetic material and at least one tumbler pin (9) is constituted by at least one main body (10) and at least one secondary pad (11). The main body (10) is constituted substantially by a magnet and applies a magnetic attraction to the ferromagnetic coding pin (8).

Description

BREAK-IN RESISTANT CYLINDER FOR LOCKS
Technical field
The present invention relates to a break-in resistant cylinder for locks, particularly suitable to thwart break-in actions which comprise impulsive percussions on at least one portion of the cylinder.
Background Art
Locks currently exist which comprise a cylinder (in which the opening key is to be inserted) provided with a stator and a rotor which are mutually coupled by means of several coding pins and tumbler pins which can slide within stator and rotor channels: each stator channel faces, and is aligned with, the respective rotor channel when the cylinder is in the closed configuration (the key is not inserted or is inserted but not rotated with respect to the insertion configuration).
An axially-acting elastic element is provided between the bottom of the stator channel and the lower surface of the tumbler pin and is designed to keep the tumbler pin spaced from such bottom, barring external actions which entail the lowering of the tumbler pin (for example the insertion of the key in the cylinder).
The key, thanks to its contoured (coded) profile, acts on the upper surface of the coding pins, lowering them and placing the shear line which separates the bottom of the coding pin from the apex of the tumbler pin in perfect alignment with the shear line that is present between the rotor and the stator, which are substantially mutually disengaged (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, which protrudes from the cylinder: in this manner it is possible to open the lock.
Highly effective break-in techniques have been devised recently which are based on the possibility of the effractor to acquire uncoded keys of the same type as the one associated with a given cylinder.
A key of this type has to be shaped by providing a succession of grooves whose depth is equal to, or greater than, the maximum depth that is present in the original key (associated with the cylinder of interest) and possibly by removing a small part of material from the portion of the key that abuts against the front of the cylinder.
Once this "generic" key has been provided, the break-in action consists in inserting the key in the cylinder, subjecting it to torque and rhythmically striking its protruding head with a means of substantial mass. The percussion of 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 impact of the inclined surface of each 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 tumbler pin (since they rest against each other), which is propelled toward the bottom of the stator channel, compressing the spring or other elastic means.
If, following a certain number of successive percussions, all the tumbler pins are at the same time each completely within the respective stator channel, at that instant the rotor and the stator are mutually disengaged (the rotor can rotate freely): the torque applied to the head of the key at that moment entails a rotation of the rotor and therefore the opening of the lock.
The described break-in action is substantially applicable to all types of cylinder and is therefore extremely dangerous also in view of the fact that often it does not even leave marks which might indicate that tampering has occurred.
Disclosure of the Invention
The aim of the present invention is to obviate the above-mentioned drawbacks and meet the mentioned requirements, by providing a break-in resistant cylinder for locks which cannot be opened with the described break-in method.
Within this aim, an object of the present invention is to provide a cylinder for locks which is simple, relatively easy to provide in practice, safe in use, effective in operation, and has a relatively low cost. This aim and this and other objects which will become better apparent hereinafter are achieved by the present break-in resistant cylinder for locks, of the type which comprises 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, channels for accommodating respective coding pins, tumbler pins and any elastic means designed to prevent the rotation of the rotor within the stator if the key is not present in said longitudinal recess, characterized in that at least one said coding pin is made substantially of ferromagnetic material and at least one said tumbler pin is constituted by at least one main body and at least one secondary pad, said main body being constituted substantially by a magnet and applying a magnetic attraction to said ferromagnetic coding pin. Brief description of the drawings Further characteristics and advantages of the invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment of a break-in resistant cylinder for locks, illustrated by way of non-limiting example in the accompanying drawings, wherein:
Figure 1 is a sectional front view, taken along a transverse vertical plane, of a first embodiment of a cylinder according to the invention in the inactive configuration;
Figure 2 is a sectional front view, taken along a transverse vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted; Figure 3 is a sectional front view, taken along a transverse vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key; Figure 4 is a sectional side view, taken along a longitudinal vertical plane, of the first embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted, and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key; Figure 5 is a side view of the coding pin and of the tumbler pin of the first embodiment of a cylinder according to the invention;
Figure 6 is a sectional front view, taken along a transverse vertical plane, of a second embodiment of a cylinder according to the invention in the inactive configuration; Figure 7 is a sectional front view, taken along a transverse vertical plane, of the second embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted;
Figure 8 is a sectional front view, taken along a transverse vertical plane, of the second embodiment of a cylinder according to the invention, with the key, modified for break-in purposes, inserted, and with the secondary pad in the lowered configuration as a consequence of the percussions applied to the key;
Figure 9 is a sectional side view, taken along a longitudinal vertical plane, of the second embodiment of a cylinder according to the invention with the key, modified for break-in purposes, inserted, and with the secondary pad in a lowered configuration as a consequence of the percussions applied to the key;
Figure 10 is a side view of the coding pin and of the tumbler pin of the second embodiment of a cylinder according to the invention. Ways of carrying out the Invention
With reference to the figures, the reference numeral 1 generally designates a break-in resistant cylinder for locks.
The cylinder 1 comprises a stator 2 which is provided with a substantially cylindrical longitudinal cavity 3 for accommodating a rotor 4. The rotor 4 has a longitudinal recess 5, through which it is possible to insert a key 6.
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) and are designed to accommodate respective coding pins 8, tumbler pins 9 and optional elastic means 7a. The coding pins 8, the tumbler pins 9 and the elastic means 7a prevent the rotation of the rotor 4 within the stator 2 if the key 6 is not present in the longitudinal recess 5.
At least one coding pin 8 (among the ones comprised within the various channels 7) is substantially made of ferromagnetic material, and at least one tumbler pin 9 (the one that corresponds to the coding pin 8 made of ferromagnetic material) is constituted by at least one main body 10 and at least one secondary pad 11.
The main body 10 is constituted substantially by a magnet and therefore applies a magnetic attraction to the respective ferromagnetic coding pin 8.
According to a first embodiment, the secondary pad 11 is made of nonmagnetic material and is not affected by any magnetic attraction or repulsion from the main body 10: in this manner, the movements of the pad 11 are affected only by any external actions (opening by means of the key 6 or break-in actions) and by the axial thrust applied by the elastic means 7a.
In particular, the pad 11 can be made of diamagnetic or paramagnetic material depending on the requirements of construction and application.
According to a second embodiment, which is alternative to the preceding one, the pad 11 is constituted substantially by a magnet and is arranged so that the end surface 11a which faces the bottom 10b of the main body 10 has the opposite magnetic polarity with respect to the magnetic polarity of the bottom 10b, the end surface 11a and the bottom 10b applying a mutual repulsion. From a manufacturing standpoint, the magnets that constitute substantially the main body 10 and the secondary pad 11 are obtained by permanently magnetizing ferromagnetic material.
In the installation configuration, without the key inserted, the base 8a of the coding pin 8 is in close contact with the head 10a of the main body 10 due to the magnetic attraction, and the bottom 10b of the main body 10 is in close contact with the end surface 11 a of the secondary pad 11 due to the axial action of the elastic means 7a. In this configuration, the main body 10 is partly contained within the stator channel 7 and partly contained within the rotor channel 4, preventing the rotation of the rotor 4 with respect to the stator 2 and therefore preventing opening.
In a configuration in which a break-in is attempted by means of impulsive actions and a modified key 6, the base 8a of the coding pin 8 is substantially always in close contact with the head 10a of the main body 10 due to the magnetic attraction (except possibly for the moment of the impulse) and the secondary pad 11 is propelled toward the bottom of the respective containment channel 7 and therefore separated from the bottom 10b of the main body 10, with consequent compression of the elastic means 7a.
In this case, the main body 10 remains partially inserted within the channel 7 of the stator 2 and in the channel 7 of the rotor 4, preventing mutual rotations for break-in purposes.
It has thus been shown that the invention achieves the intended aim and objects.
The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
All the details may further be replaced with other technically equivalent ones.
In the exemplary embodiments shown, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other exemplary embodiments.
In particular, it is possible to provide any number of compartments 10, each of which is matched by a respective unit 11, distributed along the portion of the channel 7 of the stator 2, according to constructive requirements.
Moreover, it is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.
In practice, the materials used, as well as the shapes and dimensions, may be any according to requirements without thereby abandoning the scope of the protection of the appended claims.
The disclosures in Italian Patent Application No. BO2006A000043 from which this application claims priority are incorporated herein by reference.

Claims

1. A break- in resistant cylinder for locks, of the type which comprises a stator (2) provided with a substantially cylindrical longitudinal cavity (3) for accommodating a rotor (4) with a longitudinal recess (5) for the insertion of a key (6), said rotor (4) and said stator (2) comprising a plurality of channels (7) which are substantially aligned and face each other when the cylinder (1) is in the closed configuration, channels (7) for accommodating respective coding pins (8), tumbler pins (9) and any elastic means (7a) designed to prevent the rotation of the rotor (4) within the stator (2) if the key (6) is not present in said longitudinal recess (5), characterized in that at least one said coding pin (8) is made substantially of ferromagnetic material and at least one said tumbler pin (9) is constituted by at least one main body
(10) and at least one secondary pad (11), said main body (10) being constituted substantially by a magnet and applying a magnetic attraction to said ferromagnetic coding pin (8).
2. The cylinder according to claim 1, characterized in that said secondary pad (11) is made of nonmagnetic material and is not affected by any magnetic attraction-repulsion from said main body (10).
3. The cylinder according to claim 2, characterized in that said pad (11) is made of diamagnetic material.
4. The cylinder according to claim 2, characterized in that said pad
(11) is made of paramagnetic material.
5. The cylinder according to claim 1 and as an alternative to claim 2, characterized in that said pad (11) is substantially constituted by a magnet and is arranged so that the end surface (Ha) that faces the bottom (10b) of the main body (10) has the opposite magnetic polarity with respect to the magnetic polarity of said bottom (10b), the end surface (1 Ia) and the bottom (10b) applying a mutual repulsion.
6. The cylinder according to one or more of the preceding claims, characterized in that said magnets which substantially constitute said main body (10) and said secondary pad (11) are obtained by permanently magnetizing a ferromagnetic material.
7. The cylinder according to one or more of the preceding claims, characterized in that in the installation configuration the base (8a) of said coding pin (8) is in close contact with the head (10a) of said main body (10) due to the magnetic attraction and the bottom (10b) of said main body (10) is in close contact with the end surface (1 Ia) of the secondary pad (11) due to the axial action of said elastic means (7a).
8. The cylinder according to one or more of the preceding claims, characterized in that in the configuration for attempted break- in by means of impulsive actions and modified key (6), the base (8a) of said coding pin (8) is substantially always in close contact with the head (10a) of said main body (10) due to magnetic attraction, except optionally for the instant of the impulse, and the secondary pad (11) is propelled toward the bottom of the respective containment channel (7) and thus separated from the bottom (10b) of the main body (10), with consequent compression of said elastic means (7a), said main body (10) remaining partially inserted within the channel (7) of the stator (2) and within the channel (7) of the rotor (4), preventing mutual rotations.
PCT/EP2007/050206 2006-01-27 2007-01-10 Break-in resistant cylinder for locks WO2007085526A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2006A000043 2006-01-27
ITBO20060043 ITBO20060043A1 (en) 2006-01-27 2006-01-27 ANTI-BREAKING CYLINDER FOR LOCKS

Publications (1)

Publication Number Publication Date
WO2007085526A1 true WO2007085526A1 (en) 2007-08-02

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Application Number Title Priority Date Filing Date
PCT/EP2007/050206 WO2007085526A1 (en) 2006-01-27 2007-01-10 Break-in resistant cylinder for locks

Country Status (2)

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WO (1) WO2007085526A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085542A1 (en) * 2008-01-30 2009-08-05 Liren Zheng Anti-bumping lock cylinder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007310A1 (en) * 1995-08-11 1997-02-27 Ernst Keller Spring-loaded retainer in a twist lock barrel for a safety lock
WO2001048340A1 (en) * 1999-12-27 2001-07-05 Henrik Dirk Stemmerik Burglar-proof cylinder lock
WO2005010302A2 (en) * 2003-07-31 2005-02-03 Moshe Dolev Method and assembly to prevent impact-driven manipulation of cylinder locks
DE202004015051U1 (en) * 2004-04-24 2005-09-15 Noch Klaus Locking cylinder for door lock comprises a housing pin having a first pin part and a second pin part which slide into each other and a spring acting between the first and second pin parts for moving the pin parts
JP2005290909A (en) * 2004-04-02 2005-10-20 Hori Lock Kogyo Kk Cylinder lock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007310A1 (en) * 1995-08-11 1997-02-27 Ernst Keller Spring-loaded retainer in a twist lock barrel for a safety lock
WO2001048340A1 (en) * 1999-12-27 2001-07-05 Henrik Dirk Stemmerik Burglar-proof cylinder lock
WO2005010302A2 (en) * 2003-07-31 2005-02-03 Moshe Dolev Method and assembly to prevent impact-driven manipulation of cylinder locks
JP2005290909A (en) * 2004-04-02 2005-10-20 Hori Lock Kogyo Kk Cylinder lock
DE202004015051U1 (en) * 2004-04-24 2005-09-15 Noch Klaus Locking cylinder for door lock comprises a housing pin having a first pin part and a second pin part which slide into each other and a spring acting between the first and second pin parts for moving the pin parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085542A1 (en) * 2008-01-30 2009-08-05 Liren Zheng Anti-bumping lock cylinder

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