GB2300890A - Locking device for screw-threaded fasteners - Google Patents
Locking device for screw-threaded fasteners Download PDFInfo
- Publication number
- GB2300890A GB2300890A GB9510083A GB9510083A GB2300890A GB 2300890 A GB2300890 A GB 2300890A GB 9510083 A GB9510083 A GB 9510083A GB 9510083 A GB9510083 A GB 9510083A GB 2300890 A GB2300890 A GB 2300890A
- Authority
- GB
- United Kingdom
- Prior art keywords
- locking device
- fastener
- projections
- projection
- head
- 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
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000005755 formation reaction Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
- F16B39/101—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt with a plate, spring, wire or ring holding two or more nuts or bolt heads which are mainly in the same plane
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Abstract
A resilient locking device 10 is forced onto a splined bolt-head 21 (or nut) to prevent its loosening, sharp sprags 19 projecting inwardly of the aperture 12 in the locking device 10 being deflected by the bolt-head 21 to resist removal. The locking device 10 is itself prevented from rotating either by an arm 15 engaging another bolt-head (Figure 6), or by providing the locking device 10 with external projections (not shown) engageable with the inner surface of a counterbore. The device 10 may have an overcentre action, and the number of sprags 19 differs from the number of splines S and the number of external projections. Each bolt-head 21 may have an axial projection for facilitating fitting.
Description
A LOCKING DEVICE FOR A SCREW THREADED FASTENER
The invention relates to a locking device for a screw threaded fastener and is particularly, but not exclusively, concerned with a locking device for a screw threaded fastener used on a motor vehicle.
Fasteners such as nuts and bolts can tend to work loose through vibration and, over the years, many devices have been proposed for locking fasteners against unscrewing. A simple form of locking fastener is a resilient locking washer placed between the fastener and an adjacent surface against which the fastener is screwed. The washer is formed with a plurality of twisted radial sprags which are intended to inhibit unscrewing of the fastener once it has been tightened. However, where the fastener works loose through compression of, say, a gasket, such a washer can lose its effectiveness and the fastener can unscrew. A more positive type of locking device is a tab-washer. With such an arrangement, a washer placed beneath the fastener is provided with an axial tab and a radial tab.The axial tab co-operates with a surface to prevent rotation of the fastener and once the fastener has been tightened on to the washer, the radial tab is hammered upwards into firm contact with a flat surface on the fastener. The two tabs then prevent the fastener unscrewing even if the fastener works loose through compression of a gasket. However, such a locking device is disadvantageous as it can be difficult in certain locations, for example on vehicle exhaust manifolds, for an operator to hammer the radial tab against the flat on the fastener.
An object of the present invention is to provide an improved form of locking device.
According to the invention there is provided a locking device for a screw-threaded fastener comprising a first portion formed with an opening which receives part of the fastener to be gripped by said first portion and a second portion arranged to co-operate with means for resisting rotation of the device.
With such a device, locating the fastener in the opening is a straightforward operation and there is no need to hammer any section of the device to effect locking after the manner of the tab-washer described above. Moreover, even if the load applied by the fastener effectively reduces due to compression of, say, a gasket, the second portion of the device combined with the fastener-gripping first portion resists unscrewing of the fastener.
Preferably, the opening is in the form of an aperture.
An edge of the opening may be formed with a projection which is arranged to grip a surface of the fastener when the fastener is positioned in the opening. In such a case, a plurality of such projections may be provided so as to grip the fastener at a number of different circumferential positions.
The first portion may be arranged to grip the fastener by an over centre action whereby after locating the first portion on the fastener, part of the first portion is movable axially of the fastener to cause the projection or one or more of the projections to move over centre into a firm fastener-gripping position.
In one embodiment, the or each projection tapers away from the edge of the opening to, for example, a point for gripping the fastener. Preferably, the locking device is for use on a fastener head having axial splines or other formations to receive a torque applying tool. In such a case, the number of projections is preferably different from the number of axial splines. At least some of the projections are positioned to lie between the splines or other formations to inhibit rotation of the fastener.
In another embodiment, the or each projection may be in the form of a circumferential flange which may have an arcuate edge for gripping the fastener at least to resist removal of the locking device from the fastener. The flange preferably terminates at two ends which lie, in use between splines or other formations on the fastener to inhibit rotation of the fastener.
On locating the first portion of the locking device around part of the fastener, e.g. a head of a screwthreaded bolt, the location movement is preferably arranged to deflect the or each projection so as not only to grip the fastener in a non-return sense but also to provide means which resists rotation of the fastener head relative to the first portion of the locking device. Where the aforesaid over centre action is used, such over centre movement preferably causes the or each projection to deflect and grip the fastener in a non-return sense.
The arm may extend from a third portion which receives and grips a further screw-threaded fastener. The third portion may be substantially identical to the first portion of the locking device.
Where the arm extends from a third portion of the locking device, location of the locking device on respective fasteners can be simplified by providing an axial projection on at least one and preferably on both of the fasteners. In use, one portion of the locking device, e.g. said first portIon, is located on one fastener while the third portion of the locking device is located on the projection on the other fastener. When the locking device is moved axially of its faster into a firm fastenergripping position, the projection prevents the third portion from moving out of alignment with the other fastener. The third portion of the locking device can then be moved axially of its associated faster into a firm fastener gripping position.
Locking devices in accordance with the invention will now be described by way of example with reference to the accompanying drawings in which:
Fig 1 is a plan view of one form of locking device in accordance with the invention,
Fig 2 is a plan view of a portion of the locking device shown in Fig 1 drawn to a larger scale,
Fig 3 is a plan view of the said portion of the locking device shown in Fig 2 positioned over a bolt head prior to being moved into gripping engagement therewith,
Fig 4 is a plan view of the bolt head in a different rotational position with respect to said portion of the locking device shown in Fig 3 prior to the locking device being moved into gripping engagement therewith,
Fig 5 is a cross-section through part of the device of
Fig 4 on line V-V in Fig 4 showing the locking device pressed into position on the fastener,
Fig 6 is a plan view of an alternative type of locking device in accordance with the invention,
Fig 7 is a plan view of a portion of the locking device shown in Fig 6 drawn to a larger scale,
Fig 8 is a plan view of the said portion of the locking device shown in Fig 7 positioned in relation to a bolt head prior to being moved into gripping engagement therewith,
Fig 9 is a cross-sectional side view of a further locking device in accordance with the invention showing projections thereon in a position to enable the device to be positioned or removed from a bolt head,
Fig 10 shows the locking device of Fig 9 moved into an over centre position to grip the bolt head, and
Fig 11 is a view of the fastener of Fig 5 formed with an axial projection on its head.
Referring to Figs 1 and 2, the locking device comprises a first portion 10 having an aperture 12 therein formed with three circumferentially extending projections 13 each of which has an arcuate inner edge 14 terminating at end points 14a. The device includes a second portion in the form of an arm 15 which extends away from the first portion 10 and carries at its opposite end a third portion 17 which, like the first portion 10, is formed with an aperture 18 having projections 19 on the edge thereof which have arcuate edges 20. The first portion 10 is shown in greater detail in Fig 2 and portion 17 is identical. The locking device is preferably formed from sheet metal.
In use, the apertures 12, 18 of the fastening device are spaced apart so as to correspond with the spacing of two fasteners, for example, screw-threaded bolts. In order to prevent rotational movement of the bolts, the locking device is positioned so that the apertures 12, 18 align with the heads of the bolts, one of which 21 is shown in
Fig 3. The head of each bolt shown is a known splined type having twelve axial splines S. Fig 4 shows an alternative rotational position of the bolt head 21 relative to the portion 10. Once positioned as shown in Fig 3 or 4, loading is applied to the portion 10 in a direction axially of the bolt whereby the projections 13 are caused to deflect upwardly as the locking device slides downwardly alongside the head 21 of the bolt.In that way, the projections 13 form shake-proof non-return sprags to inhibit movement of the locking device in the reverse direction.
The locking device can accommodate any rotational position of the head 21. If the head 21 is positioned as shown in Fig 3 and the locking device is then pushed on to the head, the points 14a will tend to lie in spaces between splines S1, S2 and S3, S4 to inhibit substantial rotational movement of the fastener while the arcuate edges 14 grip the splines S2, S3 to inhibit removal of the locking device from the head 21. If head 21 occupies the rotational position shown in Fig 4 and the locking device is then pushed on to the head 21, the points 14a will tend to lie slightly between the splines S2, S3 and S3, S4 to inhibit substantial rotational movement of the fastener while the arcuate surfaces 14 grip the splines S3 to inhibit removal of the locking device from the head 21.The action of the points 14a to inhibit rotation of the head 21 can be enhanced by increasing the curvature of the arcuate edges 14 of the projections 13 as shown in broken lines in Fig 4.
In Fig 4, the centre of curvature C of the broken line edge 14 is positioned radially outboard of the axis of rotation (indicated at R) of the fastener. In that way, the points 14a will lie deeper within the spaces between splines S when the locking device is urged on to the bolt head 21.
Fig 5 shows the way in which a tube 30 can be used to urge the locking device on to the bolt head 21 to deflect the projections 13. The portions, 10, 17 of the locking device can be urged into gripping engagement with their respective fasteners simultaneously with a special tool.
Conveniently, the tool may comprise two tubes 30 which are spaced apart by a distance corresponding to the spacing between the apertures 12, 18 and which are suitably interconnected. Loading applied by open ends of the tubes 30 to the portions 10, 17 will urge the locking device into gripping engagement with both of the bolt heads simultaneously.
The positioning of the locking device on both bolt heads 21 prevents rotation of the bolt heads and, therefore, provides a useful form of fastener locking which does not require manual hammering of a radial tab to effect locking as in the case of tab-washers described above.
In Fig 6 parts corresponding to parts shown in Fig 1 carry the same reference numerals. The locking device shown in Fig 6 is identical to that shown in Fig 1 except that instead of utilising arcuate projections 13, 19 the edges of the apertures 12, 18 are provided with a series of tapering projections 22, 23 which terminate at inwardly directed points 22a, 23a. The structure is shown in more detail in Figs 7 and 8. It will be noted that 13 projections 22 are provided and that there are twelve splines S on the bolt head 21. In that way, there will always be a tendency for twelve of the points 22a to lie in the respective spaces between the splines S so as to inhibit rotation of the bolt head. In the example shown, it can be seen that the thirteenth point 22a will tend to lie on the ridge of spline S1.The points 22a will grip the sides of the splines S when the locking device is urged into position on the bolt head 21 and will resist removal of the locking device from the head. The projections 23 are identical to projections 22. As with the locking device shown in Fig 1, the locking device may be pressed in position on two bolt heads 21 simultaneously.
With reference to Figs 9 and 10, the locking device can be provided with longer projections than those shown in
Figs 1 to 8, the projections being indicated at 32 in Figs 9 and 10. The projections 32 are initially formed on portion 10 so as to be pointing upwardly as viewed in Fig 9 out of the plane of the portion 10. A skirt 11 of the portion 10 is then urged upwardly whilst retaining the projections 32 in position manually. Such upward movement causes the skirt 11 to spring over centre and force the projections 32 downwardly and inwardly firmly against the bolt head 21 as shown in Fig 10. The projections 32 thus form non-return sprags which hold the locking device in place on the bolt head 21.In order to release the locking device, the said skirt 11 is pressed back in the opposite direction to the position shown in Fig 9 where upon the locking device can be withdrawn from the bolt head 21.
Such an arrangement can be provided at each end of an arm as shown in Figs 1 and 6.
Where the locking device is of an over centre type as shown in Figs 9 and 10, the over centre movement may be effected by gripping an arm extending from the portion 10 and urging the arm in the appropriate direction to move the portion 10 to lock or unlock the device. The arm may be an arm 15 which interconnects two portions 10, 17 of the overcentre locking device as in Figs 1 and 6.
When both of the fastener heads are positioned such that they can be seen by an operative using the locking devices shown in Figs 1 and 6, location of the locking devices is fairly straightforward. However, if the fastener heads 21 are not positioned in that way, it will normally be easier to fit one end of the locking device on to one bolt head 21 before fitting the other end to the other bolt head. When fitting the locking device in that way, the fitting of one end to one fastener head usually results in the arm 15 turning slightly as the projections 13 or 22 engage the splines S. It can then be difficult for the operative to fit the other end of the locking device to the second fastener head.
In order to make such fitting easier, the head of each fastener may be provided with a cylindrical projection 40 as shown in Fig II. In use, one end of the locking device is pushed on to the first fastener head 21 with the other end of the locking device located on the projection.
Therefore when using the Fig 1 locking device and with the portion 10 initially fitted to the associated fastener head 21, the projection 40 extends through the aperture in the portion 17. The projection 40 prevents rotation of the locking device as it is urged into position on the first fastener head making it easy then to urge to other end of the locking device on to the head 21 of the other fastener.
Instead of having a locking arrangement at each end of an arm 15, the locking device may comprise a single aperture and projections with an arm extending therefrom for abutment with an adjacent surface to prevent rotation of the fastener.
Instead of having an arm extending from the portion 10, an external projection or projections could be provided for gripping an adjacent surface when pushing the locking device into position on the fastener head 21. Such a surface could comprise the surface of a counterbore in which the fastener head 21 is positioned. The interior and exterior profiles of the portion 10 may be different in such a case, e.g. the number of internal projections may be different in number and/or shape from the external projections.
To remove the fastener, a spanner or socket may be engaged with the portion of the fastener head protruding through the locking device, e.g. the portion indicated at 50 in Fig 5. Torque applied by the spanner or socket would destroy the locking action of the locking device and the fastener could be unscrewed in the normal way. In the locking devices shown in Figs 1 and 6, the arm 15 could be cut and the fasteners unscrewed using a spanner or socket.
Alternatively, the locking device can be removed by prising the device from the fastener head 21.
A suitable material from which the locking device can be made is thin spring stainless steel, e.g. 0.4mm in thickness.
Claims (18)
1. A locking device for a screw threaded fastener
comprising a first portion formed with an opening which
receives part of the fastener to be gripped by said
first portion and a second portion arrange to co
operate with means for resisting rotation of the
device.
2. A locking device according to Claim 1 in which the
opening in the first portion is in the form of an
aperture.
3. A locking device according to Claim 1 or 2 in which
an edge of the opening is formed with a projection
which is arranged to grip a surface of the fastener
when the fastener is positioned in the opening.
4. A locking device according to Claim 3 in which a
plurality of projections is provided so as to grip the
fastener at a number of different circumferential
positions.
5. A locking device according to Claim 3 or 4 in which
the or each projection deflects at an angle against the
fastener to resist removal when the locking device is
located thereon.
6. A locking device according to Claim 3, 4 or 5 in
which the first portion is arranged to grip the
fastener by an overcentre action whereby after locating
the first portion on the fastener, part of the first
portion is moved axially of the fastener to an
overcentre position to cause the projection or one or
more of the projections to move into a firm fastener
gripping position.
7. A locking device according to any of Claims 3 to 6 in
which the or each projection tapers away from the edge
of the opening for gripping the fastener.
8. A locking device according to Claim 7 in which the
number of projections is different from the number of a
plurality of formations on the fastener which, in use,
co-operate with the projections to resist rotation of
the fastener.
9. A locking device according to any of Claims 3 to 8 in
which the or each projection is in the form of a
circumferential flange.
10. A locking device according to Claim 9 in which the or
each flange has an arcuate edge for gripping the
fastener at least to resist removal of the locking
device from the fastener.
11. A locking device according to Claim 9 or 10 in which
the or each flange terminates at two ends which lie, in
use, between formations on the fastener to inhibit
rotation of the fastener.
12. A locking device according to any preceding claim in
which the first portion of the locking device is
arranged to receive a screw threaded nut or the head of
a screw threaded bolt.
13. A locking device according to any preceding claim in
which the second portion comprises an arm extending
from the first portion.
14. A locking device according to Claim 13 in which the
arm extends from a third portion which receives and
grips a further screw-threaded fastener.
15. A locking device according to Claim 14 in which the
third portion of the locking device has the features of
the first portion of the locking device as set out in
any of preceding Claims 2 to 12.
16. A locking device according to Claim 14 or 15 in which
the first and third portions of the locking device are
arranged to receive and grip two identical screw
threaded fasteners.
17. A locking device according to Claim 15 or 16 in
combination with respective screw-threaded fasteners at
least one of which has an axial projection which
locates one of the first and third portions while the
other portion is being urged into gripping engagement
with its associated fastener.
18. A locking device for a screw threaded fastener
constructed and arranged substantially as described
herein with reference to Figs 1 to 5, Figs 6 to 8, Figs
9 and 10 or Fig 11 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9510083A GB2300890B (en) | 1995-05-18 | 1995-05-18 | A locking device for a screw threaded fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9510083A GB2300890B (en) | 1995-05-18 | 1995-05-18 | A locking device for a screw threaded fastener |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9510083D0 GB9510083D0 (en) | 1995-07-12 |
| GB2300890A true GB2300890A (en) | 1996-11-20 |
| GB2300890B GB2300890B (en) | 1998-05-20 |
Family
ID=10774672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9510083A Expired - Fee Related GB2300890B (en) | 1995-05-18 | 1995-05-18 | A locking device for a screw threaded fastener |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2300890B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2330637A (en) * | 1997-10-23 | 1999-04-28 | Stewart Barlow | Road wheel nut locking clip |
| FR2816382A1 (en) * | 2000-11-09 | 2002-05-10 | Renault | System for fastening together components with nut and bolt, especially fastening and removing trim around vehicle steering column, comprises destructible plate which fits around nut and holds it in place by lip which fits on one component |
| EP1231389A1 (en) * | 2001-02-13 | 2002-08-14 | Shimano Inc. | Screw retention device |
| GB2394265A (en) * | 2002-10-19 | 2004-04-21 | Ray Mason | Wheel Safety Device |
| GB2395243A (en) * | 2002-11-14 | 2004-05-19 | Business Lines Ltd | Rotation inhibiting device for adjacent nuts or bolts |
| EP1827876A1 (en) * | 2004-12-08 | 2007-09-05 | Sandvik Mining and Construction Oy | Method and arrangement for increasing safety when handling a wheel |
| DE102011085752A1 (en) * | 2011-11-04 | 2013-05-08 | Bayerische Motoren Werke Aktiengesellschaft | Securing element e.g. nose integrated locking plate, for securing e.g. nut against unintentional loosening in motor car, has body whose recess is formed in region, which is deformable to provide positive connection with screw element |
| CN108291673A (en) * | 2015-12-03 | 2018-07-17 | 赛峰直升机发动机公司 | Device for being limited the loosening of the nut in turbogenerator |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB581213A (en) * | 1944-05-25 | 1946-10-04 | Bernard Claude Rowing | A locking clip for adapted nuts |
| GB942325A (en) * | 1960-09-21 | 1963-11-20 | Cav Ltd | Locking nuts and bolts |
| GB1341304A (en) * | 1970-08-26 | 1973-12-19 | Toyota Motor Co Ltd | Fastening member and method of attaching it to a threaded attachment member |
| GB2031546A (en) * | 1978-09-15 | 1980-04-23 | Bosch Gmbh Robert | Locking assembly for pressure valve retainers in fuel injection pumps |
| EP0084764A1 (en) * | 1981-12-14 | 1983-08-03 | AB Agora | A locking or securing device for a rotatable machine element such as a bolt or a nut |
| US4534101A (en) * | 1982-01-27 | 1985-08-13 | Rexnord Inc. | Method of installing self-locking nut and bolt assembly |
| US4657457A (en) * | 1982-11-24 | 1987-04-14 | Rickwood Gerald C | Screw-action connectors security means |
| US4906150A (en) * | 1985-07-17 | 1990-03-06 | Bennett Bruce A | Locking fastener |
| GB2229241A (en) * | 1989-03-17 | 1990-09-19 | Valerie Jean Elizabeth Marsden | Retainer for fixing device |
| GB2260177A (en) * | 1991-10-02 | 1993-04-07 | Michael John Green | Device for preventing undoing of nuts |
-
1995
- 1995-05-18 GB GB9510083A patent/GB2300890B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB581213A (en) * | 1944-05-25 | 1946-10-04 | Bernard Claude Rowing | A locking clip for adapted nuts |
| GB942325A (en) * | 1960-09-21 | 1963-11-20 | Cav Ltd | Locking nuts and bolts |
| GB1341304A (en) * | 1970-08-26 | 1973-12-19 | Toyota Motor Co Ltd | Fastening member and method of attaching it to a threaded attachment member |
| GB2031546A (en) * | 1978-09-15 | 1980-04-23 | Bosch Gmbh Robert | Locking assembly for pressure valve retainers in fuel injection pumps |
| EP0084764A1 (en) * | 1981-12-14 | 1983-08-03 | AB Agora | A locking or securing device for a rotatable machine element such as a bolt or a nut |
| US4534101A (en) * | 1982-01-27 | 1985-08-13 | Rexnord Inc. | Method of installing self-locking nut and bolt assembly |
| US4657457A (en) * | 1982-11-24 | 1987-04-14 | Rickwood Gerald C | Screw-action connectors security means |
| US4906150A (en) * | 1985-07-17 | 1990-03-06 | Bennett Bruce A | Locking fastener |
| GB2229241A (en) * | 1989-03-17 | 1990-09-19 | Valerie Jean Elizabeth Marsden | Retainer for fixing device |
| GB2260177A (en) * | 1991-10-02 | 1993-04-07 | Michael John Green | Device for preventing undoing of nuts |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2330637A (en) * | 1997-10-23 | 1999-04-28 | Stewart Barlow | Road wheel nut locking clip |
| FR2816382A1 (en) * | 2000-11-09 | 2002-05-10 | Renault | System for fastening together components with nut and bolt, especially fastening and removing trim around vehicle steering column, comprises destructible plate which fits around nut and holds it in place by lip which fits on one component |
| EP1231389A1 (en) * | 2001-02-13 | 2002-08-14 | Shimano Inc. | Screw retention device |
| US6450746B1 (en) | 2001-02-13 | 2002-09-17 | Shimano, Inc. | Screw retention device having serrations |
| GB2394265A (en) * | 2002-10-19 | 2004-04-21 | Ray Mason | Wheel Safety Device |
| GB2395243A (en) * | 2002-11-14 | 2004-05-19 | Business Lines Ltd | Rotation inhibiting device for adjacent nuts or bolts |
| GB2395243B (en) * | 2002-11-14 | 2005-09-07 | Business Lines Ltd | Rotation inhibiting system for adjacent nuts or bolts |
| EP1827876A1 (en) * | 2004-12-08 | 2007-09-05 | Sandvik Mining and Construction Oy | Method and arrangement for increasing safety when handling a wheel |
| EP1827876A4 (en) * | 2004-12-08 | 2008-06-04 | Sandvik Mining & Constr Oy | Method and arrangement for increasing safety when handling a wheel |
| JP2008522894A (en) * | 2004-12-08 | 2008-07-03 | サンドビク マイニング アンド コンストラクション オサケ ユキチュア | Method and apparatus for improving safety in wheel handling |
| US7650920B2 (en) | 2004-12-08 | 2010-01-26 | Sandvik Mining And Construction Oy | Method and arrangement for increasing safety when handling a wheel |
| JP4726910B2 (en) * | 2004-12-08 | 2011-07-20 | サンドビク マイニング アンド コンストラクション オサケ ユキチュア | Method and apparatus for improving safety in wheel handling |
| DE102011085752A1 (en) * | 2011-11-04 | 2013-05-08 | Bayerische Motoren Werke Aktiengesellschaft | Securing element e.g. nose integrated locking plate, for securing e.g. nut against unintentional loosening in motor car, has body whose recess is formed in region, which is deformable to provide positive connection with screw element |
| CN108291673A (en) * | 2015-12-03 | 2018-07-17 | 赛峰直升机发动机公司 | Device for being limited the loosening of the nut in turbogenerator |
| CN108291673B (en) * | 2015-12-03 | 2020-03-03 | 赛峰直升机发动机公司 | Device for limiting the loosening of a nut in a turbine engine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9510083D0 (en) | 1995-07-12 |
| GB2300890B (en) | 1998-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20050518 |