CA2484800A1 - Washer and fastening element - Google Patents
Washer and fastening element Download PDFInfo
- Publication number
- CA2484800A1 CA2484800A1 CA002484800A CA2484800A CA2484800A1 CA 2484800 A1 CA2484800 A1 CA 2484800A1 CA 002484800 A CA002484800 A CA 002484800A CA 2484800 A CA2484800 A CA 2484800A CA 2484800 A1 CA2484800 A1 CA 2484800A1
- Authority
- CA
- Canada
- Prior art keywords
- washer
- claws
- fastening element
- opening
- free ends
- 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.)
- Abandoned
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000007373 indentation Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003973 paint 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
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
- Dowels (AREA)
Abstract
The device relates to a washer (10) for a fastening element (30), having a circumferential flange (32), having an annular washer body (11) provided with an opening (13), and having at least one holding web (12), wherein on the inner face (15) of the opening (13) there are disposed at least twa claws (16), which jut radially into the opening (13).
Thereby the distance of the tree ends (17) from the washer body (11) is the same size to twice as large as the thickness of the material used for the washer (10).
Thereby the distance of the tree ends (17) from the washer body (11) is the same size to twice as large as the thickness of the material used for the washer (10).
Description
Washer and fastening element The present invention relates to a washer for a fastening element, having a circumferential flange, having an annular washer body provided with an opening, and having at least one holding web: The invention further relates to a fastening element having a washer of this type.
A washer of the generic type is known from EP 1 091 135 A2. This washer has a washer body having at least two formed-on holding lugs, which can be placed around a circumferential flange provided on the fastening element. The washer is thereby held captively against the fastening element.
When a nut with washer is tightened on a fixed screw bolt, the washer is meant not to twist relative to the clamped structural part. To this effect, the coefficient of frict~.on between the washer and a structural part is enhanced by the fact that notches are provided on the washer body of the washer. These cause the washer to remain on the surface of the structural part as tightening takes place on a screw bolt, even if the coefficient of friction between washer body and structural part is low per se.
German utility model DE 94 00 671 U1 describes a washer which, instead of holding lugs, has an annular web running round the washer body. Measures to enhance the coefficient of friction between washer body anal structural part are not disclosed. In this embodiment, there is additionally the risk of nut and washer sticking together when surface coatings are applied.
US 2,151,919 A likewise relates to a nut having a washer, the washer body of which has on the top and bottom side notches which interact both with the surface of the structural part and with the bottom side of the nut. The notches serve merely to protect against loosening of the joint.
In the use of fastening elements having washers of the generic type, there is always the risk of damage to the surface of the structural part as a result of the notches being canted or pressed in in the structural part. Moreover, the manufacture of the previously known washers, with the modifications of their washer bodies, is complex, since the notches or other surface alterations have to be added subsequent to the washer having been made.
The object of the present invention consists in providing a washer of the generic type, which, whilst offering comparable performance, is of simpler configuration and easier to make and can be used without damage to the surface of the structural part, and in which the risk of fastening element and washer sticking together is at least reduced.
The solution consists in a washer having the features of claim 1. According to the invention, it is thus envisaged that on the inner face of the opening there are disposed at least two claws, which jut radially into the opening.
The advantage of the inventive design of the washer consists in the fact that, in each phase of the fastening operation, i.e. as the fastening element is screwed in and tightened on a screw bolt, it always remains stationary on the surface of the adjoining structural part to be fastened, regardless of the magnitude of the acting forces. This effect is based essentially upon two mechanisms.
At the beginning of the fastening operation, it is possible to distinguish between two differently sized friction radii. The first, smaller friction radius rl is defined by the diameter of the bearing region of the fastening element on the claws. The second, larger friction radius r2 is defined by the diameter of the effective friction surface of the washer on the structural part. Since the effective friction torque is proportional to the friction radius, the friction torque between washer body and structural part is greater than the friction torque between fastening element and claws.
The result is that the washer, even at the beginning of the fastening operation and also in the further course thereof , remains stationary and does not turn with the fastening element. This effect can be further reinforced, where necessary, if the bearing surface is arched slightly inwards so that it bears upon the structural part only with its outer rim. The washer can therefore be configured in the style of a cup spring.
In a later phase of the fastening operation, a sufficiently large pressure is exerted upon the claws by the bottom side of the fastening element that they move downwards in the direction of the structural part and, at the same time; inwards into the opening in the washer body. This means that the claws are pressed into the thread of the screw bolt and are wedged therein.
This has the effect, on the one hand, that the washer remains stationary also in a later phase of the fastening operation and, on the other hand, that the strength of the joint between fastening element and screw bolt is enhanced.
The pressing of the claws into the thread of the screw bolt causes the free end of the claws to deform in such a way that a screw thread is formed. This means that, when the fastening element is loosened, the washer turns along with it.
A washer of the generic type is known from EP 1 091 135 A2. This washer has a washer body having at least two formed-on holding lugs, which can be placed around a circumferential flange provided on the fastening element. The washer is thereby held captively against the fastening element.
When a nut with washer is tightened on a fixed screw bolt, the washer is meant not to twist relative to the clamped structural part. To this effect, the coefficient of frict~.on between the washer and a structural part is enhanced by the fact that notches are provided on the washer body of the washer. These cause the washer to remain on the surface of the structural part as tightening takes place on a screw bolt, even if the coefficient of friction between washer body and structural part is low per se.
German utility model DE 94 00 671 U1 describes a washer which, instead of holding lugs, has an annular web running round the washer body. Measures to enhance the coefficient of friction between washer body anal structural part are not disclosed. In this embodiment, there is additionally the risk of nut and washer sticking together when surface coatings are applied.
US 2,151,919 A likewise relates to a nut having a washer, the washer body of which has on the top and bottom side notches which interact both with the surface of the structural part and with the bottom side of the nut. The notches serve merely to protect against loosening of the joint.
In the use of fastening elements having washers of the generic type, there is always the risk of damage to the surface of the structural part as a result of the notches being canted or pressed in in the structural part. Moreover, the manufacture of the previously known washers, with the modifications of their washer bodies, is complex, since the notches or other surface alterations have to be added subsequent to the washer having been made.
The object of the present invention consists in providing a washer of the generic type, which, whilst offering comparable performance, is of simpler configuration and easier to make and can be used without damage to the surface of the structural part, and in which the risk of fastening element and washer sticking together is at least reduced.
The solution consists in a washer having the features of claim 1. According to the invention, it is thus envisaged that on the inner face of the opening there are disposed at least two claws, which jut radially into the opening.
The advantage of the inventive design of the washer consists in the fact that, in each phase of the fastening operation, i.e. as the fastening element is screwed in and tightened on a screw bolt, it always remains stationary on the surface of the adjoining structural part to be fastened, regardless of the magnitude of the acting forces. This effect is based essentially upon two mechanisms.
At the beginning of the fastening operation, it is possible to distinguish between two differently sized friction radii. The first, smaller friction radius rl is defined by the diameter of the bearing region of the fastening element on the claws. The second, larger friction radius r2 is defined by the diameter of the effective friction surface of the washer on the structural part. Since the effective friction torque is proportional to the friction radius, the friction torque between washer body and structural part is greater than the friction torque between fastening element and claws.
The result is that the washer, even at the beginning of the fastening operation and also in the further course thereof , remains stationary and does not turn with the fastening element. This effect can be further reinforced, where necessary, if the bearing surface is arched slightly inwards so that it bears upon the structural part only with its outer rim. The washer can therefore be configured in the style of a cup spring.
In a later phase of the fastening operation, a sufficiently large pressure is exerted upon the claws by the bottom side of the fastening element that they move downwards in the direction of the structural part and, at the same time; inwards into the opening in the washer body. This means that the claws are pressed into the thread of the screw bolt and are wedged therein.
This has the effect, on the one hand, that the washer remains stationary also in a later phase of the fastening operation and, on the other hand, that the strength of the joint between fastening element and screw bolt is enhanced.
The pressing of the claws into the thread of the screw bolt causes the free end of the claws to deform in such a way that a screw thread is formed. This means that, when the fastening element is loosened, the washer turns along with it.
This design further has the effect that a fastening element connected to the washer according to the invention bears in the unlined state upon the claws . A
gap consequently remains between the bottom side of the fastening element and the washer body. If the fastening element is coated, for example, with paint, oil or wax, the excess material is better able to drain away when the coating material is then spun off. The risk of fastening element and washer sticking together is hence at least diminished.
The washer according to the invention is suitable for all types of fastening elements, especially for various nut types, for example standard hexagon nuts. It can be easily made by punching-out and forming of the holding web and the claws, holding web and claws being able to be formed in a single operation.
The subject of the present invention is additionally a fastening element having a washer of this type.
Advantageous refinements are derived from the sub-claims.
A particularly preferred embodiment of the washer has three or four claws, which are preferably disposed such that they are mutually offset. The aforementioned effects are particularly effective in this embodiment.
Another advantageous refinement envisages that the free ends of the claws, in the direction of the fastening element, lie above the washer body, so that, in the fastening operation, they are pressed particularly far downwards and inwards and hence particularly firmly into the thread of the screw bolt.
Advantageously, the claws, on their side facing the fastening element, are respectively provided with a bearing surface for the bottom side of the fastening element, so that the relevant friction radius r1 can be more exactly defined. This bearing surface can be formed, for example, by the craws having an approximate S-shape or Z-shape in cross section.. The claws can also, however, be of rectilinear configuration. The height of the claws above the washer body is preferably just as large to twice as large as the material thickness.
The claws can further, at their free end, have an indentation in the shape of a circular segment, which makes it easier for the claws to be pressed into the thread of the screw bolt. The shape and size of the indentation can herein be matched to the circumference of the screw bolt. Alternatively, however, the claws can also have a straight edge at their free end, with the result that they are pressed particularly far into the thread of the screw bolt, are even more heavily deformed and are even more effectively wedged.
Depending on the design of the washer and of the fastening element, the claws can be about 1 to 3 mm long. Preferably, their length corresponds to about twice the thickness of the material used for the manufacture of the washer (e.g. sheet metal). It is important that the length of the claws is dimensioned such that, following the screw connection, the diameter dl which they define is less than the core diameter of the screw bolt which is used. That is to say, therefore, that they have an oversize relative to the core diameter of the screw bolt. Finally, it is advantageous to tailor the diameter d2 of the opening in the washer body to the nominal diameter of the thread of the fastening element, thereby producing an optimal, force-absorbing supporting surface.
The at least one holding web of the washer can be configured as a closed circumferential annular web, ox in the form of an annular web having single or multiple radial slots, or in the form of at least two holding lugs. A closed annular web simplifies the punching tool for the manufacture of the washer, whilst divided holding webs facilitate the forming.
The invention is described in greater detail below with reference to an illustrative embodiment represented in the appended figures, in which:
Figure 1 shows a top view of an embodiment of a washer according to the invention in diagrammatic non-scale representation;
Figure 2 shows a sectional representation of the washer along the line II-II in figure 1;
Figure 3 shows a partially cut representation of a fastening element with the washer according to figure 1, after structural parts have been bolted together.
Figures 1 and 2 show an illustrative embodiment of a washer 10 according to the invention, the fastening element 30, in the example a standard hexagon nut, being indicated in figure 2 in dash-dot representation.
The nut 30 has a nut body 31 having a circumferential outer flange 32. The flange 32 is formed onto the nut body 31 in one piece.
The washer 10 has a washer body 11 having a circumferential annular web 12. The washer body 11 is provided with an opening 13, which in the illustrative embodiment has a diameter d2 which is tailored to the diameter of the fastening element used. The annular web 12 juts in the axial direction over the flange 32 of the nut body 31 and, at its upper end 14, is bent radially inwards over the flange 32. Of course, instead of a circumferential annular web, a single-slotted or multi-slotted annular web can also be configured.
_ 7 _ Finally; individual (at least two) holding lugs can also be provided.
The washer 10 is held on the fastening element 30 in a loosely rotatabie manner. To this effect, an at least minor play is provided both axially and radially between the flange 32 of the nut body 31 and the annular web 12 of the washer lo.
From the inner face 15 of the opening 13, claws 16, in the illustrative embodiment four, offset by the same angle, jut radially into the opening 13. More than four or Less than four claws 16 may also be provided. Nor do the claws 16 necessarily have to be mutually offset by the same angle.
In the illustrative embodiment, the ends 17 of the claws 16 are disposed, in the direction of the fastening element 30, above the washer body 11. The distance to the washer body 11 amounts, in the illustrative embodiment, to twice the thickness of the sheet metal used for the washer, i.e. about 2 mm. The distance can also, however, be larger or smaller, as desired. The claws are additionally bent in an approximate S-shape in cross section. The upper part of the S herein forms a bearing surface 18 for the bottom side of the fastening element 30.
In the illustrative embodiment, the length of the claws 16 corresponds to about twice the thickness of the sheet metal used for the manufacture of the washer 10 and amounts to about 2 mm in the case of a 1 mm sheet thickness. With their free ends 17, the claws 16 define a diameter dl within the opening 13 in the washer body 11. The diameter dl is therefore smaller than the diameter d2 of the opening l3 itself. The length of the claws 16 is dimensioned in the individual case such that the diameter dl, following the screw connection, is less than the core diameter of the screw bolt _ g _ respectively used. The claws 16 therefore have an oversize relative to the core diameter of the screw bolt.
In the illustrative embodiment, the ends 17 of the claws 16 are of linear configuration. In figure 1, a further variant is indicated in dash-dot representation, in which the ends 17 have indentations 19 in the shape of a circular segment. The curvature of the indentations 19 can additionally be matched to the diameter of a screw bolt to be subsequently screwed in.
The washer 10 according to the invention is manufactured, in a manner which is known per se, by punching out a blank and then forming the annular web 12 and the claws 1&. The annular web 12 and the claws 16 can herein be formed in one operation.
Figure 3 shows the fastening element 30 with the washer 10 from figure 1 after two structural parts 21, 22 have been fitted together by means of a screw bolt 33. It can be seen from figure 3 that the forces generated by the screw bolt 33, as the fastening element 30 has been pulled down in the direction of the washer body 11, have forced the claws l6 downwards and inwards, and, in so doing, have pressed them into the thread 34 of the screw bolt and wedged them therein.
The washer according to the invention thus manages without subsequent modifications of the washer body 11 and yet reliably prevents the washer from turning during the fastening operation.
gap consequently remains between the bottom side of the fastening element and the washer body. If the fastening element is coated, for example, with paint, oil or wax, the excess material is better able to drain away when the coating material is then spun off. The risk of fastening element and washer sticking together is hence at least diminished.
The washer according to the invention is suitable for all types of fastening elements, especially for various nut types, for example standard hexagon nuts. It can be easily made by punching-out and forming of the holding web and the claws, holding web and claws being able to be formed in a single operation.
The subject of the present invention is additionally a fastening element having a washer of this type.
Advantageous refinements are derived from the sub-claims.
A particularly preferred embodiment of the washer has three or four claws, which are preferably disposed such that they are mutually offset. The aforementioned effects are particularly effective in this embodiment.
Another advantageous refinement envisages that the free ends of the claws, in the direction of the fastening element, lie above the washer body, so that, in the fastening operation, they are pressed particularly far downwards and inwards and hence particularly firmly into the thread of the screw bolt.
Advantageously, the claws, on their side facing the fastening element, are respectively provided with a bearing surface for the bottom side of the fastening element, so that the relevant friction radius r1 can be more exactly defined. This bearing surface can be formed, for example, by the craws having an approximate S-shape or Z-shape in cross section.. The claws can also, however, be of rectilinear configuration. The height of the claws above the washer body is preferably just as large to twice as large as the material thickness.
The claws can further, at their free end, have an indentation in the shape of a circular segment, which makes it easier for the claws to be pressed into the thread of the screw bolt. The shape and size of the indentation can herein be matched to the circumference of the screw bolt. Alternatively, however, the claws can also have a straight edge at their free end, with the result that they are pressed particularly far into the thread of the screw bolt, are even more heavily deformed and are even more effectively wedged.
Depending on the design of the washer and of the fastening element, the claws can be about 1 to 3 mm long. Preferably, their length corresponds to about twice the thickness of the material used for the manufacture of the washer (e.g. sheet metal). It is important that the length of the claws is dimensioned such that, following the screw connection, the diameter dl which they define is less than the core diameter of the screw bolt which is used. That is to say, therefore, that they have an oversize relative to the core diameter of the screw bolt. Finally, it is advantageous to tailor the diameter d2 of the opening in the washer body to the nominal diameter of the thread of the fastening element, thereby producing an optimal, force-absorbing supporting surface.
The at least one holding web of the washer can be configured as a closed circumferential annular web, ox in the form of an annular web having single or multiple radial slots, or in the form of at least two holding lugs. A closed annular web simplifies the punching tool for the manufacture of the washer, whilst divided holding webs facilitate the forming.
The invention is described in greater detail below with reference to an illustrative embodiment represented in the appended figures, in which:
Figure 1 shows a top view of an embodiment of a washer according to the invention in diagrammatic non-scale representation;
Figure 2 shows a sectional representation of the washer along the line II-II in figure 1;
Figure 3 shows a partially cut representation of a fastening element with the washer according to figure 1, after structural parts have been bolted together.
Figures 1 and 2 show an illustrative embodiment of a washer 10 according to the invention, the fastening element 30, in the example a standard hexagon nut, being indicated in figure 2 in dash-dot representation.
The nut 30 has a nut body 31 having a circumferential outer flange 32. The flange 32 is formed onto the nut body 31 in one piece.
The washer 10 has a washer body 11 having a circumferential annular web 12. The washer body 11 is provided with an opening 13, which in the illustrative embodiment has a diameter d2 which is tailored to the diameter of the fastening element used. The annular web 12 juts in the axial direction over the flange 32 of the nut body 31 and, at its upper end 14, is bent radially inwards over the flange 32. Of course, instead of a circumferential annular web, a single-slotted or multi-slotted annular web can also be configured.
_ 7 _ Finally; individual (at least two) holding lugs can also be provided.
The washer 10 is held on the fastening element 30 in a loosely rotatabie manner. To this effect, an at least minor play is provided both axially and radially between the flange 32 of the nut body 31 and the annular web 12 of the washer lo.
From the inner face 15 of the opening 13, claws 16, in the illustrative embodiment four, offset by the same angle, jut radially into the opening 13. More than four or Less than four claws 16 may also be provided. Nor do the claws 16 necessarily have to be mutually offset by the same angle.
In the illustrative embodiment, the ends 17 of the claws 16 are disposed, in the direction of the fastening element 30, above the washer body 11. The distance to the washer body 11 amounts, in the illustrative embodiment, to twice the thickness of the sheet metal used for the washer, i.e. about 2 mm. The distance can also, however, be larger or smaller, as desired. The claws are additionally bent in an approximate S-shape in cross section. The upper part of the S herein forms a bearing surface 18 for the bottom side of the fastening element 30.
In the illustrative embodiment, the length of the claws 16 corresponds to about twice the thickness of the sheet metal used for the manufacture of the washer 10 and amounts to about 2 mm in the case of a 1 mm sheet thickness. With their free ends 17, the claws 16 define a diameter dl within the opening 13 in the washer body 11. The diameter dl is therefore smaller than the diameter d2 of the opening l3 itself. The length of the claws 16 is dimensioned in the individual case such that the diameter dl, following the screw connection, is less than the core diameter of the screw bolt _ g _ respectively used. The claws 16 therefore have an oversize relative to the core diameter of the screw bolt.
In the illustrative embodiment, the ends 17 of the claws 16 are of linear configuration. In figure 1, a further variant is indicated in dash-dot representation, in which the ends 17 have indentations 19 in the shape of a circular segment. The curvature of the indentations 19 can additionally be matched to the diameter of a screw bolt to be subsequently screwed in.
The washer 10 according to the invention is manufactured, in a manner which is known per se, by punching out a blank and then forming the annular web 12 and the claws 1&. The annular web 12 and the claws 16 can herein be formed in one operation.
Figure 3 shows the fastening element 30 with the washer 10 from figure 1 after two structural parts 21, 22 have been fitted together by means of a screw bolt 33. It can be seen from figure 3 that the forces generated by the screw bolt 33, as the fastening element 30 has been pulled down in the direction of the washer body 11, have forced the claws l6 downwards and inwards, and, in so doing, have pressed them into the thread 34 of the screw bolt and wedged them therein.
The washer according to the invention thus manages without subsequent modifications of the washer body 11 and yet reliably prevents the washer from turning during the fastening operation.
Claims (15)
1. A washer (10) for a fastening element (30), having a circumferential flange (32), having an annular washer body (11) provided with an opening (13), and having at least one holding web (12), wherein on the inner face (15) of the opening (13) there are disposed at least two claws (16), which jut radially into the opening (13).
2. The washer as claimed in claim 1, wherein it has three or four claws (16).
3. The washer as claimed in one of the preceding claims, wherein the free ends (17) of the claws (16) are located, in the direction of the fastening element (30), above the washer body (11).
4. The washer as claimed in Claim 3, wherein the distance of the free ends (17) from the washer body (11) is the same size to twice as large as the thickness of the material used for the washer (10) .
5. The washer as claimed in one of the preceding claims, wherein the claws (16), on their side facing the fastening element (30), respectively have a bearing surface (18).
6. The washer as claimed in one of the preceding claims, wherein the claws (16) in cross section have an approximate S-shape or Z-shape.
7. The washer as claimed in one of claims 1-4, wherein the claws (16) are rectilinear in cross section.
8. The washer as claimed in one of the preceding claims, wherein the free ends (17) of the claws (16) have an indentation (19) approximately in the shape of a circular segment.
9. The washer as claimed in one of claims 1 to 6, wherein the free ends (17) of the claws (16) are of straight configuration.
10. The washer as claimed in one of the preceding claims, wherein the claws (16) have a length corresponding to about twice the thickness of the material used for the washer (10).
11. The washer as claimed in one of the preceding claims, wherein the at least one holding web (12) is configured as a closed circumferential annular web, or in the form of an annular web having single or multiple radial slots, or in the form of at least two holding lugs.
12. The washer as claimed in one of the preceding claims, wherein the opening (13) has a diameter (d2) tailored to the nominal diameter of the thread of the fastening element (30).
13. The washer as claimed in one of the preceding claims, wherein, in a cup-spring-like configuration, it is arched slightly inwards.
14. A fastening element (30) having a circumferential flange (32), to which a washer (10) as claimed in one of claims 1 to 13 is captively fitted.
15. The fastening element as claimed in claim 14, namely a nut.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20317178.0 | 2003-11-04 | ||
| DE20317178U DE20317178U1 (en) | 2003-11-04 | 2003-11-04 | Washer and fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2484800A1 true CA2484800A1 (en) | 2005-05-04 |
Family
ID=34353556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002484800A Abandoned CA2484800A1 (en) | 2003-11-04 | 2004-10-14 | Washer and fastening element |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1529970B1 (en) |
| AT (1) | ATE349628T1 (en) |
| CA (1) | CA2484800A1 (en) |
| DE (2) | DE20317178U1 (en) |
| ES (1) | ES2275159T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009014162A1 (en) * | 2009-03-20 | 2010-09-23 | Nedschroef Plettenberg Gmbh | fastener |
| CN110762106A (en) * | 2019-11-12 | 2020-02-07 | 浙江宝威电气有限公司 | Dedicated stud of transformer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2151919A (en) * | 1935-03-25 | 1939-03-28 | Illinois Tool Works | Locking device |
| US2225654A (en) * | 1938-11-21 | 1940-12-24 | Illinois Tool Works | Fastener unit and method of making same |
| US2631633A (en) * | 1947-12-18 | 1953-03-17 | Robin Products Co | Nut and lock washer assembly |
| US3881392A (en) * | 1974-01-28 | 1975-05-06 | Illinois Tool Works | Tension indicating fastener unit |
-
2003
- 2003-11-04 DE DE20317178U patent/DE20317178U1/en not_active Expired - Lifetime
-
2004
- 2004-09-10 ES ES04021516T patent/ES2275159T3/en active Active
- 2004-09-10 DE DE502004002428T patent/DE502004002428D1/en active Active
- 2004-09-10 EP EP04021516A patent/EP1529970B1/en active Active
- 2004-09-10 AT AT04021516T patent/ATE349628T1/en not_active IP Right Cessation
- 2004-10-14 CA CA002484800A patent/CA2484800A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1529970A1 (en) | 2005-05-11 |
| EP1529970B1 (en) | 2006-12-27 |
| DE20317178U1 (en) | 2005-03-17 |
| ES2275159T3 (en) | 2007-06-01 |
| ATE349628T1 (en) | 2007-01-15 |
| DE502004002428D1 (en) | 2007-02-08 |
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |