GB2374641A - Tamper resistant wheel fastener - Google Patents
Tamper resistant wheel fastener Download PDFInfo
- Publication number
- GB2374641A GB2374641A GB0109426A GB0109426A GB2374641A GB 2374641 A GB2374641 A GB 2374641A GB 0109426 A GB0109426 A GB 0109426A GB 0109426 A GB0109426 A GB 0109426A GB 2374641 A GB2374641 A GB 2374641A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- threaded
- threaded member
- cap
- key
- 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.)
- Granted
Links
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 244000138939 Ricinodendron heudelotii Species 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/485—Spanners; Wrenches for special purposes for theft-proof screws, bolts or nuts
-
- 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
- F16B23/0061—Specially shaped nuts or heads of bolts or screws for rotations by a tool with grooves, notches or splines on the external peripheral surface designed for tools engaging in radial direction
-
- 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)
- Dowels (AREA)
Abstract
A tamper resistant wheel fastener (i.e. nut or bolt) (1) comprises a screw-threaded member (2), there being a cap (3) rotatably mounted on the screw-threaded member (2). The screw-threaded member (2) comprises a portion (6) for engagement with a complimentary member on a base, such as a wheel hub, a shoulder (3), and a non-circular profile for engagement by a key for rotating the screw-threaded member (2). The cap (3) comprises a skirt having relieved portions in its periphery which can be moved, by rotation of the cap, into register with the non-circular profile of the screw-threaded member (2) to facilitate application of the key.
Description
<Desc/Clms Page number 1>
SCREW-THREADED FASTENING
This invention relates to a screw-threaded fastening and, more particularly, to a screw-threaded fastening requiring a non-standard tool for un-screwing the fastening.
The preferred embodiment of the invention is intended particularly as a wheelfastening for a motor vehicle, but it is to be understood that the invention is not limited to this application and may, on the contrary, be applied to a wide range of screwthreaded fastenings where some degree of tamper-resistance is required.
It is well known to use tamper resistant fastenings to secure the wheels of a motor vehicle. Typically, such tamper resistant fastenings include a non-circular profile which can be engaged by a key to facilitate rotation of the fastening, but which cannot be rotated by means of standard tools (for example standard bi-hexagonal sockets).
Typically, tamper resistant fastenings are used to retain alloy wheels which are chosen, at least in part, for aesthetic considerations. Accordingly, it is important that the tamper resistant fastenings used do not detract from the aesthetic appeal of the wheels they secure. This factor, combined with the desire to provide as much tamper resistance as possible within a robust structure imposes severe limitations on the designer of tamper-resistant screw-threaded fastenings.
The preferred embodiment of the present invention provides a tamper resistant fastening screw-threaded which is suitable for use in retaining vehicle wheels, which is robust, which has a pleasing appearance, and which in the preferred embodiment is assembled by means of a particularly simple and efficient fabrication technique.
According to a first aspect of the present invention there is provided a screwthreaded fastening comprising: a screw-threaded member; and a cap rotatably mounted on the screw-threaded member; the screw-threaded member comprising a screw-threaded portion for screw-threaded engagement with a complementary screwthreaded member on or of a base, a shoulder for forcing an article into engagement
<Desc/Clms Page number 2>
with the base as the screw-threaded fastening is tightened, and a non-circular profile for engagement by a key for rotating the screw-threaded member; and the cap comprising a skirt which telescopically receives an end portion of the screw-threaded member, the skirt including relieved portions in the periphery thereof which may be moved, by rotation of the cap, into register with the non-circular profile of the screwthreaded member to facilitate the application of the key to the screw-threaded member and land portions between the relieved portions which at least partially cover the noncircular profile of the screw-threaded member when the relieved portions are out of register with the non-circular profile.
Preferably, the screw-threaded fastening is used to secure an object, for example the wheel of a motor vehicle, which includes a recess which receives the noncircular portion of the screw-threaded member and at least part of the skirt of the cap. Preferably, the recess is sized to receive the screw-threaded fastening with only a small radial clearance. Accordingly, when the screw-threaded fastening is in use the view which is presented to someone endeavouring the remove the fastening is of the cap which is partially received within the recess. Because the cap is rotatable relative to the screw threaded member, the application of a tool (for example a self-gripping wrench) to the cap is not effective to rotate the screw-threaded member. In order to rotate the screw-threaded member the cap must be rotated to bring the relieved portions of the cap skirt into register with the non-circular profile of the screwthreaded member and a key applied to the non-circular profile of the screw-threaded member to facilitate rotation of the screw-threaded member.
Preferably, the non-circular profile of the screw-threaded member is provided by means of relieved portions formed in the outer surface of a circular portion of the screw-threaded member. In the preferred embodiment of the invention the circular portion is a flange, one side of which defines the shoulder of the screw-threaded member. Preferably, the relieved portions of the screw-threaded member are partcylindrical recesses in the periphery of the circular member.
Preferably, the recesses in the screw-threaded member and/or the skirt of the
<Desc/Clms Page number 3>
cap limit the zone with which the key engages screw-threaded member to a relatively shallow circumferential band. In other words, the components are preferably configured so that the key does not extend far inwardly from the overall circular profile of the portion of the screw-threaded member in which the relieved portions are formed. With such an arrangement, although a satisfactory force can be applied with the correct key, if attempts are made to fabricate a"master"key which engages only one recess portion of the screw-threaded member, these attempts will be frustrated because the master key will tend to cam out of the recess which it engages, before sufficient torque can be applied to the screw-threaded member to loosen it.
Attempts to form a"master"key by grinding off all but one of the projections of one regular key can further be frustrated if the regular key is shaped such that grinding off of a projection thereof of necessity breaks the skirt of the key at the point of the projection. This desirable characteristic can be obtained if each projection has associated therewith a relieved portion of the outer surface of the key. If the projection is ground off the relieved portion forms a break in the periphery of the key thereby substantially reducing the strength ofthe key and enhancing to the cammingout action referred to above.
In the particularly preferred embodiment of the invention the cap is retained on the screw-threaded member by means of an outwardly flared portion at the end of the screw-threaded member which is received in an under-cut groove within the cap.
Preferably, the under-cut groove is of frusto-conical form and the outwardly flared portion of the nut closely conforms to the part-conical surface of the under-cut groove. Preferably, the components are assembled by forming a deformable end portion of the threaded member which has substantially the same diameter as the portion of the cap between the undercut groove and the open mouth thereof. The cap may accordingly be slid onto the screw-threaded member and the deformable region deformed outwardly into the undercut. Preferably, the components are shaped such that the required deformation of the end region of the screw-threaded member can be achieved simply by forcing the cap onto the screw-threaded member. Preferably, the force
<Desc/Clms Page number 4>
required is applied as a percussive force by means of a blow to the cap. It has been found that such an arrangement forms a reliable and high strength connection between the cap and the screw-threaded member, whilst at the same time provides a rotatable connection which is not capable of transferring substantial torque from the cap to the screw-threaded member.
The invention will be better understood from the following description of a preferred embodiment thereof, given by way of example only, reference being had to the accompanying drawings, wherein:
Figure 1 is a longitudinal cross-section of a preferred embodiment of the invention;
Figures 2 and 3 are respectively a longitudinal cross-sectional view and end view of the screw-threaded member of the fastening of Figure 1, prior to assembly with the cap ; Figures 4 and 5 are respectively a longitudinal cross-sectional view and end view of the cap of the screw-threaded fastening of Figure 1; and
Figures 6 and 7 are respectively a longitudinal cross-section view and end view of a key for the screw-threaded fastening of Figure 1.
Referring firstly to Figure 1, the screw-threaded fastening I shown in the drawings is in the form of a wheel nut for a motor vehicle. The fastening comprises a screw-threaded member 2, a cap 3, and a captive washer 4. The screw-threaded member includes an axial bore 5 formed with screw-threads 6 for engaging the threads of a stud of the hub of a motor vehicle. Whilst the preferred embodiment of the invention is embodied as a nut, it will be appreciated that the invention can be embodied as a bolt which can be secured to a threaded aperture provided, for example, in the hub of a motor vehicle.
The screw-threaded member defines a shoulder 7 which, via the washer 4 is used to clamp a wheel against the hub of a motor vehicle. The shoulder 7 is formed by one side of a flange 8 which is an integral part of the screw-threaded member 2.
The cap 3 is retained on the screw-threaded member 2 by means of an
<Desc/Clms Page number 5>
outwardly flared portion 9 of the screw-threaded member which is received within an undercut groove 10 of the cap. The undercut groove 10 is substantially frusto-conical in shape and the outwardly flared portion 9 lies against the part-conical surface of the undercut groove. With such an arrangement, the distal end 11 of the cap is maintained in light rubbing engagement with the proximal surface 12 of the flange 8 and rattling of the cap 3 on the screw-threaded member 2 is prevented. However, the cap 3 is free to rotate relative to the screw-threaded member 2 with the result that any attempt to unscrew the screw-threaded member from its use position by rotating the cap is ineffective.
Referring now to Figures 2 and 3, it would be seen that the external profile 13 of the flange 8 is circular. In order to facilitate rotation of the screw-threaded member by means of a key a plurality of part-cylindrical recesses 14 are formed in the material of the flange. In order to rotate the screw-threaded member a key is required. A key suitable for rotating the screw-threaded member of Figures 2 and 3 is illustrated in Figures 6 and 7. It will be noted that the key includes a skirt 15 which has formed on the inner surface thereof a multiplicity of projections 16. The key is sized such that the projections 16 project a small distance into the recesses 14 so that torque can be applied by the key to the screw-threaded member. For this purpose, the key 17 includes a portion 18 formed with a conventional drive profile, for example a hexagonal profile. It will be noted that the profile of the projections 16 is not complementary to that of the recesses 14. The projections 16 are sized such that they project only a small distance into the recesses 14, for reasons which will be explained in more detail below.
It will be appreciated that the number and position of the recesses 14 may be varied in order to provide a large number of"differs". For example, the recesses can vary in number. For example, there may be three recesses, four recesses or five recesses. The angular position of the recesses relative to each other may also be varied. For example, looking at Figure 3 two of the recesses may remain opposite sides of a diameter and the other two recesses may be varied in position relative to that
<Desc/Clms Page number 6>
diameter in order to achieve the required number of differs. Each combination of recesses will have associated with it a unique key 17.
It will be noted from Figure 7 that each projection 16 has associated therewith a recess 19 in the outer surface of the key. It will further be noted that if an attempt is made to produce a"master key"having only one projection 16 by taking a standard key and grinding off all but one of the projections 16, the effect of grinding off the projections will be to break through the peripheral skirt 15 of the key at each point where a projection is ground off. The resultant gap in the peripheral skirt will substantially weaken the key and if an attempt is made to use such a key to remove a nut the key will deform allowing the one remaining projection 16 to cam out of the recess in which it is positioned. This feature substantially reduces the risk of unauthorised removal of the wheel nut.
Referring now to Figures 4 and 5, the cap 3 is shown. The cap 3 includes a skirt 20 in which recesses 21 are formed. The recesses 21 correspond to the recesses 14 of the screw-threaded member so that by rotating the cap 3 the recesses 21 may be brought into register with the recesses 14 to allow the key to be applied to the recesses 14. It will be noted that the portions 22 of the skirt 20 between the recesses 21 form lands which prevent general access to the flange 8. However, the recesses 21 do not extend to the full axial length of the skirt 20 with the result that the portions 23 of the skirt 20 which are located in line with the recesses 21 limit access to the recesses 21 and 14 to a relatively shallow circumferential band. This shallow circumferential band corresponds to the portions of the projections 16 which, in use, enter the recesses 14.
It will be noted from Figure 2 that, as manufactured, the proximal end of the threaded member includes a relatively thin-walled extension 24. In the assembled fastening of Figure 1 this portion 24 has been deformed outwardly to form the flared portion 9. It has been found that the required outward deflection of the extension portion 24 can be produced if the cap is slid onto the screw-threaded member until the end face 25 of the portion 24 engages a shoulder 26 provided at one end of the
<Desc/Clms Page number 7>
undercut groove 10. If the nut is then supported and a percussive blow is applied to
the cap the portion 24 will deform outwardly to the configuration illustrated in Figure 1.
It will be noted that for most applications of the fastening illustrated in the drawings a recess will be provided in the member to be fastened which will receive a washer 4, flange 8 and at least part of the skirt 20. Such an arrangement not only limits access to the flange 8 but means that the only visible portion of the fastening is the cap 3. The cap 3 may be made of a pleasing appearance and may, for example, be chromium plated steel or of polished stainless steel.
Claims (10)
1. A screw-threaded fastening comprising: a screw-threaded member; and a cap rotatably mounted on the screw-threaded member; the screw-threaded member comprising a screw-threaded portion for screw-threaded engagement with a complementary screw-threaded member on or of a base, a shoulder for forcing an article into engagement with the base as the screw-threaded fastening is tightened, and a non-circular profile for engagement by a key for rotating the screw-threaded member; and the cap comprising a skirt which telescopically receives an end portion of the screw-threaded member, the skirt including relieved portions in the periphery thereof which may be moved, by rotation of the cap, into register with the non-circular profile of the screw-threaded member to facilitate the application of the key to the screw-threaded member and land portions between the relieved portions which at least partially cover the non-circular profile of the screw-threaded member when the relieved portions are out of register with the non-circular profile.
2. A screw-threaded fastening as claimed in claim 1, wherein the noncircular profile of the screw-threaded member is provided by means of relieved portions formed in the outer surface of a circular portion of the screw-threaded member.
3. A screw-threaded fastener as claimed in claim 2, wherein the circular portion is a flange, one side of which defines the shoulder of the screw-threaded member.
4. A screw-threaded fastener as claimed in claims 2 or 3, wherein the relieved portions of the screw-threaded member are part-cylindrical recesses in the periphery of the circular member.
5. A screw-threaded fastener as claimed in any of the preceding claims,
<Desc/Clms Page number 9>
wherein the relieved portions in the screw-threaded member and/or the skirt of the cap limit the zone with which the key engages the screw-threaded member to a relatively shallow circumferential band.
6. A screw-threaded fastener as claimed in any of the preceding claims, wherein the cap is retained on the screw-threaded member by means of an outwardly flared portion at the end of the screw-threaded member which is received in an undercut groove within the cap.
7. A screw-threaded fastener as claimed in claim 6, wherein the undercut groove is of frusto-conical form and the outwardly flared portion of the nut closely conforms to the part-conical surface of the under-cut groove.
8. A screw-threaded fastener as claimed in claim 7, wherein the screwthreaded member and the cap are assembled by forming a deformable end portion of the threaded member which has substantially the same diameter as the portion of the cap between the undercut groove and an open mouth thereof.
9. A screw-threaded fastener as claimed in claim 8, wherein the screwthreaded member and the cap are shaped such that the required deformation of the end region of the screw-threaded member can be achieved simply by pressing the cap onto the screw-threaded member.
10. A screw-threaded fastener as claimed in claim 9, wherein the force required to press the cap onto the screw-threaded member is applied as a percussive force by means of a blow to the cap.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0109426A GB2374641B (en) | 2001-04-17 | 2001-04-17 | Screw-threaded fastening |
GB0414414A GB2400061A (en) | 2001-04-17 | 2001-04-17 | A key for rotating a fastener |
HK02109388.9A HK1047967A1 (en) | 2001-04-17 | 2002-12-28 | Tamper resistant wheel fastener |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0109426A GB2374641B (en) | 2001-04-17 | 2001-04-17 | Screw-threaded fastening |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0109426D0 GB0109426D0 (en) | 2001-06-06 |
GB2374641A true GB2374641A (en) | 2002-10-23 |
GB2374641B GB2374641B (en) | 2004-09-01 |
Family
ID=9912923
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0414414A Withdrawn GB2400061A (en) | 2001-04-17 | 2001-04-17 | A key for rotating a fastener |
GB0109426A Expired - Fee Related GB2374641B (en) | 2001-04-17 | 2001-04-17 | Screw-threaded fastening |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0414414A Withdrawn GB2400061A (en) | 2001-04-17 | 2001-04-17 | A key for rotating a fastener |
Country Status (2)
Country | Link |
---|---|
GB (2) | GB2400061A (en) |
HK (1) | HK1047967A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10280966B2 (en) | 2016-02-16 | 2019-05-07 | Mcgard Llc | High security fastener with internal shroud buckled retainer |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3020026B1 (en) * | 2014-04-17 | 2018-02-09 | Societe Des Forges De Froncles | ANTI-THEFT FIXING DEVICE FOR SOLIDARIZING A WHEEL ON THE HUB OF A MOTOR VEHICLE |
CN112682410A (en) * | 2020-12-22 | 2021-04-20 | 上海电气集团上海电机厂有限公司 | Fastening bolt structure suitable for large pretightening force |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2006371A (en) * | 1977-10-04 | 1979-05-02 | Hart H | Fastening means |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1138546A (en) * | 1966-08-02 | 1969-01-01 | Snap On Tools Corp | Wrench sockets, socket drives, and similar couplers |
GB1405550A (en) * | 1972-02-07 | 1975-09-10 | Yamamoto Biyora Kk | Headed machine screw and a wrench therefor |
US3908489A (en) * | 1973-11-30 | 1975-09-30 | Yamamoto Byora Co Ltd | Fastener driver |
GB2241996A (en) * | 1990-03-13 | 1991-09-18 | Christopher Gaven Dunn | Security nuts and bolts |
GB2256821B (en) * | 1991-06-17 | 1994-06-29 | Auto Turned Products | Threaded security fastening and driving device therefor |
GB2295343B (en) * | 1994-11-22 | 1998-01-14 | Boc Group Plc | Handwheel socket |
-
2001
- 2001-04-17 GB GB0414414A patent/GB2400061A/en not_active Withdrawn
- 2001-04-17 GB GB0109426A patent/GB2374641B/en not_active Expired - Fee Related
-
2002
- 2002-12-28 HK HK02109388.9A patent/HK1047967A1/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2006371A (en) * | 1977-10-04 | 1979-05-02 | Hart H | Fastening means |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10280966B2 (en) | 2016-02-16 | 2019-05-07 | Mcgard Llc | High security fastener with internal shroud buckled retainer |
US10280965B2 (en) | 2016-02-16 | 2019-05-07 | Mcgard Llc | High security fastener with buckled shroud retainer |
US10443645B2 (en) | 2016-02-16 | 2019-10-15 | Mcgard Llc | High security fastener with external shroud retainer |
US10816028B2 (en) | 2016-02-16 | 2020-10-27 | Mcgard Llc | Method of forming high security fastener with internal shroud buckled retainer |
US10989245B2 (en) | 2016-02-16 | 2021-04-27 | Mcgard Llc | High security fastener with buckled shroud retainer |
US11339821B2 (en) | 2016-02-16 | 2022-05-24 | Mcgard Llc | High security fastener with external shroud retainer |
Also Published As
Publication number | Publication date |
---|---|
GB2374641B (en) | 2004-09-01 |
GB0414414D0 (en) | 2004-07-28 |
HK1047967A1 (en) | 2003-03-14 |
GB0109426D0 (en) | 2001-06-06 |
GB2400061A (en) | 2004-10-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4618299A (en) | Locknut and key therefor | |
US6095735A (en) | Locking nut assembly | |
US6227782B1 (en) | Self-locking threaded fastener assembly | |
EP2044342B1 (en) | Locknut system | |
US6517301B2 (en) | Fastener assembly including a screw element and a supporting element | |
US4211128A (en) | Vehicle wheel lug nut apparatus | |
US6736579B2 (en) | Screw device and assembly for theft-proofing vehicle wheels | |
US6357981B1 (en) | Fastener structure | |
US20060133910A1 (en) | Fastener cap assembly and method | |
EP2014934B1 (en) | Lock nut | |
JP2014234915A (en) | Bolt for wheel attachment and wheel attachment structure | |
US5370486A (en) | Vehicle locking fastener assembly | |
US4478458A (en) | Locking and anti-loosening construction for vehicle rim | |
CA2318550A1 (en) | Improved wheel nut assembly | |
EP0253496B1 (en) | Security wheel nut or bolt | |
GB2374641A (en) | Tamper resistant wheel fastener | |
WO2004001237A1 (en) | Screw-threaded fastening | |
EP3056748B1 (en) | Locking device made as a nut or bolt | |
US7011481B2 (en) | Securing nut including a nut body and straining ring | |
JPS59227501A (en) | Wheel for bicycle | |
JP3218078U (en) | Fixing device | |
CN211398193U (en) | Bolt structure with trapezoidal rotation stopping groove | |
CN211398218U (en) | Rotation-stopping and release-stopping pad and fastening connection mechanism | |
WO2001009527A1 (en) | Anti-theft device | |
CN217735986U (en) | Locking nut |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1047967 Country of ref document: HK |
|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20140417 |