GB2095356A - Antitheft device for bolts or nuts - Google Patents

Antitheft device for bolts or nuts Download PDF

Info

Publication number
GB2095356A
GB2095356A GB8200674A GB8200674A GB2095356A GB 2095356 A GB2095356 A GB 2095356A GB 8200674 A GB8200674 A GB 8200674A GB 8200674 A GB8200674 A GB 8200674A GB 2095356 A GB2095356 A GB 2095356A
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GB
United Kingdom
Prior art keywords
bolt
head
shell
block
bores
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB8200674A
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Individual
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Individual
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 Individual filed Critical Individual
Publication of GB2095356A publication Critical patent/GB2095356A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0069—Specially shaped nuts or heads of bolts or screws for rotations by a tool with holes to be engaged with corresponding pins on the tool or protruding pins to be engaged with corresponding holes on the tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005—Measures against unauthorised operation of bolts, nuts or pins

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)
  • Lock And Its Accessories (AREA)
  • Clamps And Clips (AREA)

Abstract

An antitheft device, consists of a bolt (1) with a cylindrical head (2) housed in a bored cylindrical shell (3), which is mounted with clearance on the bolt shank or on a collar (5) of the bolthead; the head ends in a front face (6) having a number of bores (7) parallel to the axis and arranged in a given pattern; the positions and the diameters of said bores correspond with the positions and the diameters of as many pins (8) projecting from the front face of a block (10) having a hexagonal portion (11) which can be engaged by a spanner. <IMAGE>

Description

SPECIFICATION Anititheft device The invention relates to an antitheft device, according to the invention there is provided an antitheft device characterised by a screw threaded member ending in a head housed in a bored cylindrical shell which has inwardly projecting flange and which is mounted with clearance on the shank of said threaded body or on a collar of the bolt head, which head has a face having a number of bores therein parallel to the axis and arranged according to a given pattern, the positions and the diameters of said bores corresponding with the positions and the diameters of pins projecting from the end face of a block having a surface position which can be operatively engaged by a spanner or the like.
Preferably also the outer surface of said shell has hexagonal cross-section.
Advantageously, the extremity of the bolt shank, in contact with a collar of the bolthead, carries a washer forcedly fitted.
The construction described aims to prevent the bolt from being unscrewed from its seat, by persons who do not have the block with pins acting as a secret key.
The invention will become more apparent from the following description with reference to the annexed drawings, in which: Fig 1 is a side view of a bolt according to the inven tion; Fig. 2 is a front view; Fig. 3 and 4 show the cylindrical shell; Figs. 5 and 6 show the key block; and - Figs. 7 and 8 show the washer.
As shown in the drawing, head 2 of a bolt 1 is housed in a bored cylindrical shell 3 having an inwardly projecting flange 4 and mounted with clearance on the shank of bolt 1 or on a collar 5 of head 2. That head ends in a front face 6 having a number of bores 7, parallel with the axis and arranged in a given pattern. The positions and diameters of said bores correspond with the positions and diameters of as many pins 8 projecting from the end face 9 of a block 10 of which a portion is hexagonally shaped and can be engaged by a spanner or the like.
Preferably the outer surface of said shell 3 is of hexagonal cross-section.
Advantageously the extremity of the bolt shank, in contact with a step or collar of the head, carries a washer 13 forcedly mounted on said shank.
The axial length of shell 3 is greater than that of head 2. The remaining hollow 14 may be closed by a pug 15, preferably of rubber.
In operating position the antitheft device is arranged as shown in Fig. 1.
The end portion remote from shell 3 has a male or female thread (in that second case, a nut should be referred to instead of a bolt, but the operation is the same).
A person having key-block 10 engages by it the head 2 by inserting pins 8 in bores 7 and then, by acting on the hexagonal portion 11 of block 10, he screws the bolt or nut on its seat and introduces plug 15 into hollow 14.
If the bolt or nut has to be unscrewed, it is sufficient to act in the opposite direction on portion 11 of block 10.
Any unauthorized person trying to remove the bolt would be deceived by the provision of plug 15 which gives the bolt a conventional appearance, and by the hexagonal contour of shell 3 which suggests to engage it by a spanner orthe like; yet that action will be unsuccessful as the shell is idle and cannot transmit torsional stresses.
It will be appreciated that the number, the shapes and the positions of bores 7 may be changed in various ways so that any person desiring to make a set of blocks 10 should make a lot of unsuccessful attempts.
This kind of antitheft device is suitable for many applications, and its use has proved particularly successful in preventing motor-vehicle wheels from being stolen.
It is clear that the above description refers merely to an exemplary embodiment, and changes and modifications are possible without departing from the scope of the invention claimed. Thus for instance portion 11 of block 10 could be in the form of quadrangular instead of hexagonal prism or it could have two parallel faces allowing the engagement by a spanner or the like.
1. An antitheft device, characterised by a screw threaded member ending in a head housed in a bore cylindrical shell which has an inwardly projecting flange and which is mounted with clearance on the shank of said threaded body or on a collar of the bolt head, which head has a face having a number or bores therein parallel to the axis and arranged according to a given pattern, the positions and the diameters of said bores corresponding with the positions and the diameters of pins projecting from the end face of a block having a surface portion which can be operatively engaged by a spanner or the like.
2. Device according to claim 1, characterized in that said bored shell has an hexagonal outer surface.
3. Device according to claims 1 or 2, characterized in that the axial length of said shell is greater than the axial of said head so as to leave a hollow which can be closed by a plug.
4. Device according to claims 1,2, or 3, characterised in that said screw threaded member is a bolt.
5. Device according to claims 1, 2 or 3, characterized in that said threaded member is a nut.
6. An antitheft device, substantially as herein described and shown in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Anititheft device The invention relates to an antitheft device, according to the invention there is provided an antitheft device characterised by a screw threaded member ending in a head housed in a bored cylindrical shell which has inwardly projecting flange and which is mounted with clearance on the shank of said threaded body or on a collar of the bolt head, which head has a face having a number of bores therein parallel to the axis and arranged according to a given pattern, the positions and the diameters of said bores corresponding with the positions and the diameters of pins projecting from the end face of a block having a surface position which can be operatively engaged by a spanner or the like. Preferably also the outer surface of said shell has hexagonal cross-section. Advantageously, the extremity of the bolt shank, in contact with a collar of the bolthead, carries a washer forcedly fitted. The construction described aims to prevent the bolt from being unscrewed from its seat, by persons who do not have the block with pins acting as a secret key. The invention will become more apparent from the following description with reference to the annexed drawings, in which: Fig 1 is a side view of a bolt according to the inven tion; Fig. 2 is a front view; Fig. 3 and 4 show the cylindrical shell; Figs. 5 and 6 show the key block; and - Figs. 7 and 8 show the washer. As shown in the drawing, head 2 of a bolt 1 is housed in a bored cylindrical shell 3 having an inwardly projecting flange 4 and mounted with clearance on the shank of bolt 1 or on a collar 5 of head 2. That head ends in a front face 6 having a number of bores 7, parallel with the axis and arranged in a given pattern. The positions and diameters of said bores correspond with the positions and diameters of as many pins 8 projecting from the end face 9 of a block 10 of which a portion is hexagonally shaped and can be engaged by a spanner or the like. Preferably the outer surface of said shell 3 is of hexagonal cross-section. Advantageously the extremity of the bolt shank, in contact with a step or collar of the head, carries a washer 13 forcedly mounted on said shank. The axial length of shell 3 is greater than that of head 2. The remaining hollow 14 may be closed by a pug 15, preferably of rubber. In operating position the antitheft device is arranged as shown in Fig. 1. The end portion remote from shell 3 has a male or female thread (in that second case, a nut should be referred to instead of a bolt, but the operation is the same). A person having key-block 10 engages by it the head 2 by inserting pins 8 in bores 7 and then, by acting on the hexagonal portion 11 of block 10, he screws the bolt or nut on its seat and introduces plug 15 into hollow 14. If the bolt or nut has to be unscrewed, it is sufficient to act in the opposite direction on portion 11 of block 10. Any unauthorized person trying to remove the bolt would be deceived by the provision of plug 15 which gives the bolt a conventional appearance, and by the hexagonal contour of shell 3 which suggests to engage it by a spanner orthe like; yet that action will be unsuccessful as the shell is idle and cannot transmit torsional stresses. It will be appreciated that the number, the shapes and the positions of bores 7 may be changed in various ways so that any person desiring to make a set of blocks 10 should make a lot of unsuccessful attempts. This kind of antitheft device is suitable for many applications, and its use has proved particularly successful in preventing motor-vehicle wheels from being stolen. It is clear that the above description refers merely to an exemplary embodiment, and changes and modifications are possible without departing from the scope of the invention claimed. Thus for instance portion 11 of block 10 could be in the form of quadrangular instead of hexagonal prism or it could have two parallel faces allowing the engagement by a spanner or the like. CLAIMS
1. An antitheft device, characterised by a screw threaded member ending in a head housed in a bore cylindrical shell which has an inwardly projecting flange and which is mounted with clearance on the shank of said threaded body or on a collar of the bolt head, which head has a face having a number or bores therein parallel to the axis and arranged according to a given pattern, the positions and the diameters of said bores corresponding with the positions and the diameters of pins projecting from the end face of a block having a surface portion which can be operatively engaged by a spanner or the like.
2. Device according to claim 1, characterized in that said bored shell has an hexagonal outer surface.
3. Device according to claims 1 or 2, characterized in that the axial length of said shell is greater than the axial of said head so as to leave a hollow which can be closed by a plug.
4. Device according to claims 1,2, or 3, characterised in that said screw threaded member is a bolt.
5. Device according to claims 1, 2 or 3, characterized in that said threaded member is a nut.
6. An antitheft device, substantially as herein described and shown in the accompanying drawings.
GB8200674A 1981-03-24 1982-01-11 Antitheft device for bolts or nuts Withdrawn GB2095356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67409/81A IT1143397B (en) 1981-03-24 1981-03-24 BOLT OR ANTI-THEFT NUT

Publications (1)

Publication Number Publication Date
GB2095356A true GB2095356A (en) 1982-09-29

Family

ID=11302147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8200674A Withdrawn GB2095356A (en) 1981-03-24 1982-01-11 Antitheft device for bolts or nuts

Country Status (6)

Country Link
JP (1) JPS57157812A (en)
DE (1) DE3148565A1 (en)
ES (1) ES262836Y (en)
FR (1) FR2502710A1 (en)
GB (1) GB2095356A (en)
IT (1) IT1143397B (en)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611379A (en) * 1983-08-01 1986-09-16 H&E Machine Company Method of removably securing a security threaded fastener apparatus
US4618299A (en) * 1984-03-07 1986-10-21 Mcgard, Inc. Locknut and key therefor
US4631887A (en) * 1986-01-31 1986-12-30 Francovitch Thomas F Non-penetrating roof membrane anchoring system
FR2587422A1 (en) * 1985-09-13 1987-03-20 Blimex Anti-theft device for fixing, by screwing, especially a vehicle wheel
GB2194827A (en) * 1986-08-14 1988-03-16 Leonard Albert Cooper Driving formations of screws
US4742702A (en) * 1987-03-16 1988-05-10 Swertz Edward P Anti-theft device for a wheel lug nut
US4805946A (en) * 1985-04-01 1989-02-21 Pitney Bowes Inc. Postage meter security seal
US4964773A (en) * 1988-09-23 1990-10-23 Reinhold Schmidt Anti-theft apparatus including a screw with an anti-theft safety head
FR2651284A1 (en) * 1989-08-24 1991-03-01 Louail Regis Anti-theft system
DE9203163U1 (en) * 1992-03-10 1992-04-23 Uwe Metzer Holz-Montagebau, 21033 Hamburg Sleeve nut for high-strength thread and screw connections of wood, plastic and steel parts
US5131796A (en) * 1990-07-06 1992-07-21 Herum Roger A Security fastener for threaded objects
GB2255606A (en) * 1991-05-09 1992-11-11 Mcgard Inc Anti-theft nut assembly
US5228250A (en) * 1992-08-03 1993-07-20 Kesselman David A Tamper proof anchor bolt assembly
US5360304A (en) * 1993-05-11 1994-11-01 Mcgard, Inc. Fastener construction
FR2712845A1 (en) * 1993-11-22 1995-06-02 Vassal Michel Anti-theft device for securing nuts or bolts of e.g. motor vehicle wheels
FR2736110A1 (en) * 1995-06-27 1997-01-03 Lazare Serge Rene Threaded connecting piece of a nut and screw which incorporates tamper=proof sleeve
US5857798A (en) * 1997-04-03 1999-01-12 Eagle One Golf Products Inc Golf flag theft protection
US5863166A (en) * 1996-08-05 1999-01-26 Pinhead Components Inc. Anti-theft locking device
WO1999019636A1 (en) 1997-10-09 1999-04-22 Pinhead Components Inc. Anti-theft locking device
GB2330565A (en) * 1997-10-21 1999-04-28 Stephen Charles Foster Security system for caravans and trailers
GB2302575B (en) * 1995-06-23 1999-09-01 Francis Stuart Jezierski Thief resistant nuts
US6062787A (en) * 1998-12-22 2000-05-16 Maddalena; Kris L. Tamper resistant valve stem cap
WO2001007793A1 (en) 1999-07-23 2001-02-01 Pinhead Components, Inc. Tamper resistant fastener
GB2361901A (en) * 2000-05-05 2001-11-07 Peter Elliot A system for preventing unauthorised movement of a vehicle
FR2857066A1 (en) * 2003-07-02 2005-01-07 Peugeot Citroen Automobiles Sa Antitheft screw mounting method for motor vehicle, has epoxy glue and brazing powder layer placed between screw head and hollow housing for connecting screw head and cap
WO2006047171A1 (en) * 2004-10-26 2006-05-04 Trade Management Group Limited Security screw
WO2011114097A2 (en) 2010-03-15 2011-09-22 Atomic22 Limited Security fastener
EP3037603A1 (en) * 2009-05-01 2016-06-29 VKR Holding A/S A burglar-proof locking device for fastening of a light dome to a skylight window sash
CN108071644A (en) * 2018-01-30 2018-05-25 海盐储鑫紧固件厂 A kind of anti-theft bolt of Anti-loose
CN108087411A (en) * 2018-01-30 2018-05-29 海盐储鑫紧固件厂 A kind of anti-theft bolt
CN109838447A (en) * 2019-01-30 2019-06-04 胡伟明 Multifunctional integrated device and its installation tool based on communication pipe anti-theft
WO2021141480A1 (en) * 2020-01-10 2021-07-15 Islas Fernandez Guillermo Safety nut or screw with combination for vehicle wheels

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59119163A (en) * 1982-12-27 1984-07-10 大阪瓦斯株式会社 Engine heat pump type air-conditioning hot-water supply device
JP2527404Y2 (en) * 1990-05-26 1997-02-26 松下電工株式会社 Mounting structure for exterior materials
DE4413971A1 (en) * 1994-04-21 1995-10-26 Bayerische Motoren Werke Ag Vehicle roof rack with transverse supports
DE19510547C2 (en) * 1995-03-23 1997-02-20 Silvretta Sherpas Sportartikel Anti-theft device
DE19543721A1 (en) * 1995-04-04 1996-06-13 Heinz Dingfelder Securing device for shut=off valves
US5628602A (en) * 1996-01-18 1997-05-13 Kyo-Ei Sangyo Kabushiki Kaisha Anti-theft hub nut for vehicle wheels
DE20207831U1 (en) 2002-05-18 2002-09-19 Gundel, Georg, 91154 Roth Radschraube
EP2192245B1 (en) * 2008-11-27 2012-05-30 Vestas Wind Systems A/S Tower for a wind turbine and a method for assembling the tower
CN112727886B (en) * 2020-12-24 2022-07-01 浙江天元金属制品股份有限公司 Convenient to use's self-tapping screw for woodwork

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611379A (en) * 1983-08-01 1986-09-16 H&E Machine Company Method of removably securing a security threaded fastener apparatus
US4618299A (en) * 1984-03-07 1986-10-21 Mcgard, Inc. Locknut and key therefor
US4805946A (en) * 1985-04-01 1989-02-21 Pitney Bowes Inc. Postage meter security seal
FR2587422A1 (en) * 1985-09-13 1987-03-20 Blimex Anti-theft device for fixing, by screwing, especially a vehicle wheel
US4631887A (en) * 1986-01-31 1986-12-30 Francovitch Thomas F Non-penetrating roof membrane anchoring system
GB2194827A (en) * 1986-08-14 1988-03-16 Leonard Albert Cooper Driving formations of screws
US4742702A (en) * 1987-03-16 1988-05-10 Swertz Edward P Anti-theft device for a wheel lug nut
US4964773A (en) * 1988-09-23 1990-10-23 Reinhold Schmidt Anti-theft apparatus including a screw with an anti-theft safety head
FR2651284A1 (en) * 1989-08-24 1991-03-01 Louail Regis Anti-theft system
US5131796A (en) * 1990-07-06 1992-07-21 Herum Roger A Security fastener for threaded objects
GB2255606A (en) * 1991-05-09 1992-11-11 Mcgard Inc Anti-theft nut assembly
GB2255606B (en) * 1991-05-09 1994-11-16 Mcgard Inc Nut device
DE4244102A1 (en) * 1992-03-10 1993-09-23 Uwe Metzer Holz Montagebau Domed nut for threaded fixture to wood, plastics and metal - has underside of head at angle greater than 90 deg., head has three equispaced holes as location for special tool and threads are coated in plastics
DE9203163U1 (en) * 1992-03-10 1992-04-23 Uwe Metzer Holz-Montagebau, 21033 Hamburg Sleeve nut for high-strength thread and screw connections of wood, plastic and steel parts
US5228250A (en) * 1992-08-03 1993-07-20 Kesselman David A Tamper proof anchor bolt assembly
US5360304A (en) * 1993-05-11 1994-11-01 Mcgard, Inc. Fastener construction
FR2712845A1 (en) * 1993-11-22 1995-06-02 Vassal Michel Anti-theft device for securing nuts or bolts of e.g. motor vehicle wheels
GB2302575B (en) * 1995-06-23 1999-09-01 Francis Stuart Jezierski Thief resistant nuts
FR2736110A1 (en) * 1995-06-27 1997-01-03 Lazare Serge Rene Threaded connecting piece of a nut and screw which incorporates tamper=proof sleeve
US5863166A (en) * 1996-08-05 1999-01-26 Pinhead Components Inc. Anti-theft locking device
US5857798A (en) * 1997-04-03 1999-01-12 Eagle One Golf Products Inc Golf flag theft protection
WO1999019636A1 (en) 1997-10-09 1999-04-22 Pinhead Components Inc. Anti-theft locking device
GB2330565A (en) * 1997-10-21 1999-04-28 Stephen Charles Foster Security system for caravans and trailers
GB2330565B (en) * 1997-10-21 2002-01-09 Stephen Charles Foster The fozloc security system for caravans and trailers
US6062787A (en) * 1998-12-22 2000-05-16 Maddalena; Kris L. Tamper resistant valve stem cap
WO2001007793A1 (en) 1999-07-23 2001-02-01 Pinhead Components, Inc. Tamper resistant fastener
EP1203164B1 (en) * 1999-07-23 2004-09-22 Pinhead Components Inc. Tamper resistant fastener
GB2361901A (en) * 2000-05-05 2001-11-07 Peter Elliot A system for preventing unauthorised movement of a vehicle
FR2857066A1 (en) * 2003-07-02 2005-01-07 Peugeot Citroen Automobiles Sa Antitheft screw mounting method for motor vehicle, has epoxy glue and brazing powder layer placed between screw head and hollow housing for connecting screw head and cap
WO2006047171A1 (en) * 2004-10-26 2006-05-04 Trade Management Group Limited Security screw
EP3037603A1 (en) * 2009-05-01 2016-06-29 VKR Holding A/S A burglar-proof locking device for fastening of a light dome to a skylight window sash
WO2011114097A2 (en) 2010-03-15 2011-09-22 Atomic22 Limited Security fastener
US9004836B2 (en) 2010-03-15 2015-04-14 Atomic 22 Limited Security fastener
CN108071644A (en) * 2018-01-30 2018-05-25 海盐储鑫紧固件厂 A kind of anti-theft bolt of Anti-loose
CN108087411A (en) * 2018-01-30 2018-05-29 海盐储鑫紧固件厂 A kind of anti-theft bolt
CN109838447A (en) * 2019-01-30 2019-06-04 胡伟明 Multifunctional integrated device and its installation tool based on communication pipe anti-theft
WO2021141480A1 (en) * 2020-01-10 2021-07-15 Islas Fernandez Guillermo Safety nut or screw with combination for vehicle wheels

Also Published As

Publication number Publication date
IT1143397B (en) 1986-10-22
DE3148565A1 (en) 1982-10-14
JPS57157812A (en) 1982-09-29
ES262836U (en) 1982-11-01
ES262836Y (en) 1983-04-16
FR2502710A1 (en) 1982-10-01
IT8167409A0 (en) 1981-03-24

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