CA2239473A1 - Threaded fastener - Google Patents
Threaded fastener Download PDFInfo
- Publication number
- CA2239473A1 CA2239473A1 CA 2239473 CA2239473A CA2239473A1 CA 2239473 A1 CA2239473 A1 CA 2239473A1 CA 2239473 CA2239473 CA 2239473 CA 2239473 A CA2239473 A CA 2239473A CA 2239473 A1 CA2239473 A1 CA 2239473A1
- Authority
- CA
- Canada
- Prior art keywords
- fastener
- thread
- fastener according
- shank portion
- tip portion
- 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
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 17
- 238000005755 formation reaction Methods 0.000 description 12
- 239000002023 wood Substances 0.000 description 10
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 239000011121 hardwood Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000011122 softwood 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material
Abstract
A fastener having a shank portion (11), at least part of the shank portion being provided with a screw thread (14), an head portion (12) at one end of the shank portion and a tip portion (13) at the other end of the shank portion wherein the screw thread does not extend to the tip portion. The tip portion is substantially symmetrical about the axis of the shank portion, and may be pointed and/or conical, with a generally smooth outer surface. The head portion has a recess therein, such as a single elongate slot or a cruciform formation (26), to enable the fastener to be rotated by an appropriate tool.
Since the screw thread does not extend to the tip portion, the fastener may be inserted into a material by hammering, while the form of the thread prevents removal of the fastener from the material other than by application of rotational movement. The fastener may thus be inserted into a material rapidly, without the necessity of imparting rotational movement to the fastener.
Since the screw thread does not extend to the tip portion, the fastener may be inserted into a material by hammering, while the form of the thread prevents removal of the fastener from the material other than by application of rotational movement. The fastener may thus be inserted into a material rapidly, without the necessity of imparting rotational movement to the fastener.
Description
Title: THREADED FASTENER
Description of Invention This invention relates to a threaded fastener. A fastener in accordance with the invention has been devised primarily, but not exclusively, for use in wood or materials having sirnilar properties to those of wood.
Numerous types of threaded fasteners, commt-nly called screws, are known; there are different types of screw-thread varying in respect at least of their thread configuration and/or pitch according to their inten~ed use. What such threaded fasteners have in cornrnon, however, is that they are all intended to be driven into the material with which they are to be used by rotation of the fastener so that the thread causes the fastener to penetrate the material. Thus the use of such fasteners to secure components together is a relatively time co.~.. i.,~operation. The time taken to drive a fastener may be reduced by the use of a power screw-driver or the like, but is still significant. Further, access to thefastener to drive it rotationally is not always easy, for example if a person driving the fastener has to reach up to it.
It is one object of the present invention to provide a fastener which enables these problems to be overcome or reduced.
According to the present invention, there is provided a fastener having a shank portion, a head portion at one end of the shank portion, and a tip portion at the other end of the shank portion; wherein at least a part of the shank portion is provided with a screw-thread which does not extend to the tip portion.
Preferably, the head portion has a driving formation therein for cooperation with a tool for driving the fastener by rotation thereof. Such a driving formation may be of any conventional type, e.g. a single elongate slot or a cruciform recess formation. There are different types of cruciform recess formations known for screws: for example that known as the "POZIDRIV"
(Registered Trade Mark) recess may be utili~ed.
Preferably the tip portion of the fastener is substantially symmetrical about the longitudinal axis of the shank portion. Preferably the tip portion is CA 02239473 l998-06-03 pointed to a sufficient extent to enable it to penetrate a material such as woodwhen the fastener is driven by a harnmer in the manner of a nail. Thus the tip portion may be generally conical, and may have a substantially smooth outer surface.
The screw-thread preferably extends on the shank portion of the fastener from a position at or near the tip portion, and it may extend thererro along the entire len~th of the shanlc portion to the head portion or may terrninate at a position spaced from the head portion.
The thread is preferably a stepped thread, comprising at least one helical thread formation having flanks of which that facing the tip portion of the fastener is inclined at a relatively small angle to the axis of the shank portion, compared with the inclination of the flank facing the head portion of the fastener.
The flank of the thread formation facing the head portion of the fastener may afford a shoulder, which may be at an angle at or near 90~ to the axis of the shank portion.
Thus penetration of a fastener in accordance with the invention into a material such as wood solely by application of force in the direction of the length of the fastener, e.g. by h~rnmering the head of the fastener, is possible.
Withdrawal of the fastener, however, is not readily possibly by mere applicationof force to the fastener in the opposite direction of its length, since the shoulder afforded by the thread resists such removal. ~he fastener can, however, be removed by turning it so that it "unscrews" in conventional manner.
The thread may have a pitch which is generally like that of a known type of woodscrew or screw intended for another sirnilar material; it will be appreciated that woodscrews are available having different thread pitches to render them especially suitable for different intended uses, and a fastener in accordance with the invention may similarly have its pitch selected in accordance with its intended use.
In a fastener in accordance with the invention, the difference between the major and minor diameters of the thread will be selected to suit the material ~, with which the fastener is intended to be used. For a hard wood, the difference between the major and rninor thread diameters would be less than if the fasteneris intended to be inserted into a soft wood. It is envisaged that fasteners having a major thread diameter of between 2 and 12mrn may be provided.
The fastener is preferably produced by rolling in a thread rol~ing die, and preferably the head portion and tip portion are formed at the same time as the thread. The driving formation in the head may be provided by a subsequent p~lnching operation.
Thereafter, the fastener is preferably heat treated by a process involving heating and then quenching the fastener. The heat treatment process may involve subjecting the fastener to a temperature in the range 400~C to 500~C, for example.
Preferably the fastener is formed from a low carbon steel, e.g. steel with a carbon content of between 0.07~o and 0.15%.
The invention will now be described by way of example with reference to the accompanying drawings, wherein:-FIGURE 1 is a side view of a fastener in accordance with the invention;
FIGURE 2 is a view of part of the fastener, inserted into a materialsuch as wood;
FIGURE 3 is a perspective view of the head portion of the fastener.
~ eferring to the drawings, a fastener indicated generally at 10 comprises a shank portion 11, a head portion 12, and a tip port;on 13. A helicalscrew thread 15 is provided on a part of the shank portion 11, the thread extending on the shank portion 11 from a region adjacent an upper part 15 of thetip portion to a position spaced beneath the head portion 12.
The head portion 12 has a frusto-conical undersurface 25 like that of ~ a countersunk wood screw, and a flat upper end surface 16. In the head, extending into it from its surface 16, there is a driving recess 26 which, as illustrated, is a cruciform recess of the type known by the registered trade mark -"POSIDRIV". However, it will be appreciated that alternative driving formations,eg a single elongate slot or a recess of other cruciform or, indeed, any other known configuration, could be provided.
The tip portion 13 of the fastener is substantially conical, tapering to a point of sufficient sharpness to enable the fastener to be driven into a material by application of force thereto in the manner ~f h~mmering a nail. 'rhe tip portion is symrnetrical about the axis of the fastener and its external surface is sllbst~nti~lly smooth. In particular, it will be noted that the screw thread does not extend to the surface of the tip portion. This enables the fastener to enter a material such as wood in the manner of a nail and since the tip portion is substantially symmetrical about the axis of the fastener, no sideways bias to the fastener is imparted by the tip portion when axial force is applied to the fastener.
This contrasts with conventional wood screws which have a thread running fully to the pointed tip of the fastener: in such a case, the thread of helical configuration on the tip would present an angled surface which would impede straight entry of the fastener to a material such as wood if an attempt were made to drive such a fastener by hammering it axially.
The screw thread 14 is provided by a helical thread formation on the shank portion 11, such thread formation being generally of the configuration which is sometimes known as a buttress thread or is herein referred to as a stepped thread. The helical thread formation has its flank (indicated at 14a in Figure 2) which faces the tip portion of the fastener inclined at a relatively shallow angle to the axis of the shank portion of the fastener compared with theinclin~tinn of its other flank ~14b) which faces the head portion of the fastener.
The thread formation thus provides a helical shoulder, indicated at 17, facing the head portion of the fastener and such shoulder may extend at an angle at or near90~ to the axis of the shank portion.
Figure 2 further illustrates the major and minor diameters D1 and D2 of the thread. The difference between such major and minor diameters may be greatest when the fastener is intended for insertion into a relatively soft material.
During insertion of a fastener into a piece 2~ of material such as wood, such insertion being by driving the fastener by application of a force thereto, eg by h~mmering, in the direction F1, the material 21 is able to be displaced outwardly transversely of the fastener. Due to the resilience of the material 21it partially returns in the opposite direction so as to occupy regions 18 ~ <e.nt the shoulder 17 of the thread. Thus, the fastener remains tightly held by the material 21. To remove the fastener, torque must be applied thereto, as in~lic~ted by the arrow F2, so that the fastener is "unscrewed" in the manner of a conventional wood screw.
Insertion of a fastener in accordance with the invention by a h,zlmmering action rather than ~y rotationally driving it is a quick and easy operation, and particularly facilitates use of the fastener when access thereto is restricted, ie when application of a screw driver to the fastener is ~liffi~llt Since the fastener, in accordance with the invention, is made by a thread rolling process, rather than having a pinch-pointed tip portion, m~nllf~cture of the fastener is simplified and m~mlf~ctllring times are reduced The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for ~tt~ining the disclosed result, as appropriate, may, separately or in any combination of such features, be utilised for re~li.cing the invention in diverse forms thereof.
Description of Invention This invention relates to a threaded fastener. A fastener in accordance with the invention has been devised primarily, but not exclusively, for use in wood or materials having sirnilar properties to those of wood.
Numerous types of threaded fasteners, commt-nly called screws, are known; there are different types of screw-thread varying in respect at least of their thread configuration and/or pitch according to their inten~ed use. What such threaded fasteners have in cornrnon, however, is that they are all intended to be driven into the material with which they are to be used by rotation of the fastener so that the thread causes the fastener to penetrate the material. Thus the use of such fasteners to secure components together is a relatively time co.~.. i.,~operation. The time taken to drive a fastener may be reduced by the use of a power screw-driver or the like, but is still significant. Further, access to thefastener to drive it rotationally is not always easy, for example if a person driving the fastener has to reach up to it.
It is one object of the present invention to provide a fastener which enables these problems to be overcome or reduced.
According to the present invention, there is provided a fastener having a shank portion, a head portion at one end of the shank portion, and a tip portion at the other end of the shank portion; wherein at least a part of the shank portion is provided with a screw-thread which does not extend to the tip portion.
Preferably, the head portion has a driving formation therein for cooperation with a tool for driving the fastener by rotation thereof. Such a driving formation may be of any conventional type, e.g. a single elongate slot or a cruciform recess formation. There are different types of cruciform recess formations known for screws: for example that known as the "POZIDRIV"
(Registered Trade Mark) recess may be utili~ed.
Preferably the tip portion of the fastener is substantially symmetrical about the longitudinal axis of the shank portion. Preferably the tip portion is CA 02239473 l998-06-03 pointed to a sufficient extent to enable it to penetrate a material such as woodwhen the fastener is driven by a harnmer in the manner of a nail. Thus the tip portion may be generally conical, and may have a substantially smooth outer surface.
The screw-thread preferably extends on the shank portion of the fastener from a position at or near the tip portion, and it may extend thererro along the entire len~th of the shanlc portion to the head portion or may terrninate at a position spaced from the head portion.
The thread is preferably a stepped thread, comprising at least one helical thread formation having flanks of which that facing the tip portion of the fastener is inclined at a relatively small angle to the axis of the shank portion, compared with the inclination of the flank facing the head portion of the fastener.
The flank of the thread formation facing the head portion of the fastener may afford a shoulder, which may be at an angle at or near 90~ to the axis of the shank portion.
Thus penetration of a fastener in accordance with the invention into a material such as wood solely by application of force in the direction of the length of the fastener, e.g. by h~rnmering the head of the fastener, is possible.
Withdrawal of the fastener, however, is not readily possibly by mere applicationof force to the fastener in the opposite direction of its length, since the shoulder afforded by the thread resists such removal. ~he fastener can, however, be removed by turning it so that it "unscrews" in conventional manner.
The thread may have a pitch which is generally like that of a known type of woodscrew or screw intended for another sirnilar material; it will be appreciated that woodscrews are available having different thread pitches to render them especially suitable for different intended uses, and a fastener in accordance with the invention may similarly have its pitch selected in accordance with its intended use.
In a fastener in accordance with the invention, the difference between the major and minor diameters of the thread will be selected to suit the material ~, with which the fastener is intended to be used. For a hard wood, the difference between the major and rninor thread diameters would be less than if the fasteneris intended to be inserted into a soft wood. It is envisaged that fasteners having a major thread diameter of between 2 and 12mrn may be provided.
The fastener is preferably produced by rolling in a thread rol~ing die, and preferably the head portion and tip portion are formed at the same time as the thread. The driving formation in the head may be provided by a subsequent p~lnching operation.
Thereafter, the fastener is preferably heat treated by a process involving heating and then quenching the fastener. The heat treatment process may involve subjecting the fastener to a temperature in the range 400~C to 500~C, for example.
Preferably the fastener is formed from a low carbon steel, e.g. steel with a carbon content of between 0.07~o and 0.15%.
The invention will now be described by way of example with reference to the accompanying drawings, wherein:-FIGURE 1 is a side view of a fastener in accordance with the invention;
FIGURE 2 is a view of part of the fastener, inserted into a materialsuch as wood;
FIGURE 3 is a perspective view of the head portion of the fastener.
~ eferring to the drawings, a fastener indicated generally at 10 comprises a shank portion 11, a head portion 12, and a tip port;on 13. A helicalscrew thread 15 is provided on a part of the shank portion 11, the thread extending on the shank portion 11 from a region adjacent an upper part 15 of thetip portion to a position spaced beneath the head portion 12.
The head portion 12 has a frusto-conical undersurface 25 like that of ~ a countersunk wood screw, and a flat upper end surface 16. In the head, extending into it from its surface 16, there is a driving recess 26 which, as illustrated, is a cruciform recess of the type known by the registered trade mark -"POSIDRIV". However, it will be appreciated that alternative driving formations,eg a single elongate slot or a recess of other cruciform or, indeed, any other known configuration, could be provided.
The tip portion 13 of the fastener is substantially conical, tapering to a point of sufficient sharpness to enable the fastener to be driven into a material by application of force thereto in the manner ~f h~mmering a nail. 'rhe tip portion is symrnetrical about the axis of the fastener and its external surface is sllbst~nti~lly smooth. In particular, it will be noted that the screw thread does not extend to the surface of the tip portion. This enables the fastener to enter a material such as wood in the manner of a nail and since the tip portion is substantially symmetrical about the axis of the fastener, no sideways bias to the fastener is imparted by the tip portion when axial force is applied to the fastener.
This contrasts with conventional wood screws which have a thread running fully to the pointed tip of the fastener: in such a case, the thread of helical configuration on the tip would present an angled surface which would impede straight entry of the fastener to a material such as wood if an attempt were made to drive such a fastener by hammering it axially.
The screw thread 14 is provided by a helical thread formation on the shank portion 11, such thread formation being generally of the configuration which is sometimes known as a buttress thread or is herein referred to as a stepped thread. The helical thread formation has its flank (indicated at 14a in Figure 2) which faces the tip portion of the fastener inclined at a relatively shallow angle to the axis of the shank portion of the fastener compared with theinclin~tinn of its other flank ~14b) which faces the head portion of the fastener.
The thread formation thus provides a helical shoulder, indicated at 17, facing the head portion of the fastener and such shoulder may extend at an angle at or near90~ to the axis of the shank portion.
Figure 2 further illustrates the major and minor diameters D1 and D2 of the thread. The difference between such major and minor diameters may be greatest when the fastener is intended for insertion into a relatively soft material.
During insertion of a fastener into a piece 2~ of material such as wood, such insertion being by driving the fastener by application of a force thereto, eg by h~mmering, in the direction F1, the material 21 is able to be displaced outwardly transversely of the fastener. Due to the resilience of the material 21it partially returns in the opposite direction so as to occupy regions 18 ~ <e.nt the shoulder 17 of the thread. Thus, the fastener remains tightly held by the material 21. To remove the fastener, torque must be applied thereto, as in~lic~ted by the arrow F2, so that the fastener is "unscrewed" in the manner of a conventional wood screw.
Insertion of a fastener in accordance with the invention by a h,zlmmering action rather than ~y rotationally driving it is a quick and easy operation, and particularly facilitates use of the fastener when access thereto is restricted, ie when application of a screw driver to the fastener is ~liffi~llt Since the fastener, in accordance with the invention, is made by a thread rolling process, rather than having a pinch-pointed tip portion, m~nllf~cture of the fastener is simplified and m~mlf~ctllring times are reduced The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for ~tt~ining the disclosed result, as appropriate, may, separately or in any combination of such features, be utilised for re~li.cing the invention in diverse forms thereof.
Claims (23)
1. A fastener having a shank portion, a head portion at one end of the shank portion, and a tip portion at the other end of the shank portion, wherein at least a part of the shank portion is provided with a screw thread and the screw thread is not provided on the tip portion.
2. A fastener according to Claim 1 wherein the head portion has a driving formation adapted to be engaged by a tool to rotate the fastener.
3. A fastener according to Claim 2 wherein the driving formation is a single elongate slot.
4. A fastener according to Claim 2 wherein the driving formation is a cruciform recess.
5. A fastener according to any one of the preceding claims wherein the tip portion is substantially symmetrical about the longitudinal axis of the shank portion.
6. A fastener according to any one of the preceding claims wherein the tip portion is pointed.
7. A fastener according to any one of the preceding claims wherein the tip portion is generally conical.
8. A fastener according to any one of the preceding claims wherein the tip portion has a substantially smooth outer surface.
9. A fastener according to any one of the preceding claims wherein the screw thread extends on the shank portion from a position at or near the tip portion.
10. A fastener according to Claim 9 wherein the thread extends along the shank portion to the head portion.
11. A fastener according to Claim 9 wherein the thread terminates at a position spaced from the head portion.
12. A fastener according to any one of the preceding claims wherein the thread is a stepped thread.
13. A fastener according to Claim 12 wherein the stepped thread comprises a helical thread formation whose flank facing the tip portion of the fastener is inclined at a relatively shallow angle to the axis of the shank portion, compared with the inclination of its flank facing the head portion of the fastener.
14. A fastener according to Claim 13 wherein the flank of the thread formation facing the head portion of the fastener affords a shoulder.
15. A fastener according to any one of the preceding claims which is produced by rolling in a thread rolling die.
16. A fastener according to Claim 15 wherein the thread rolling die is adapted to roll the head portion and tip portion at the same time as the thread.
17. A fastener according to Claim 15 or Claim 16 wherein the fastener is subsequently subjected to a heat treatment process comprising heating and then quenching the fastener.
18. A fastener according to Claim 17 wherein the fastener is subjected to atemperature of 400°C to 500°C
19. A fastener according to any one of the preceding claims which is formed from a low carbon steel.
20. A fastener according to Claim 19 wherein the steel has a carbon contentof between 0.07% and 0.15%.
21. A fastener substantially as hereinbefore described by reference to and as illustrated in the accompanying drawings.
22. Any novel feature or novel combination of features described herein and/or in the accompanying drawings.
23. A fastener having a shank portion, a head potion at one end of the shank portion, and a tip portion at the other end of the shank portion, a part of the shank portion being provided with a screw thread and the head portion having a driving formation adapted to be engaged by a tool for rotating the fastener; wherein the tip portion is pointed and generally conical, having a substantially smooth outer surface, the shank portion is of substantially constant diameter throughout its length, and the screw thread extends on the shank portion from a position near the tip portion to a position spaced from thehead portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9525624.4A GB9525624D0 (en) | 1995-12-15 | 1995-12-15 | Threaded fastener |
| GB9525624.4 | 1995-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2239473A1 true CA2239473A1 (en) | 1997-06-26 |
Family
ID=10785449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2239473 Abandoned CA2239473A1 (en) | 1995-12-15 | 1996-12-13 | Threaded fastener |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0866921A1 (en) |
| JP (1) | JP2000502169A (en) |
| AU (1) | AU1185297A (en) |
| CA (1) | CA2239473A1 (en) |
| GB (1) | GB9525624D0 (en) |
| WO (1) | WO1997022811A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2361977A (en) * | 2000-05-05 | 2001-11-07 | Robert Butler | Self locating wood screw |
| DE10060244A1 (en) * | 2000-12-05 | 2002-06-20 | Lutz Planitz | Screw has sharp, unthreaded point, allowing it to be partially driven in with hammer, after which it is screwed in as usual |
| DE10258238B4 (en) * | 2002-12-13 | 2005-11-10 | Audi Ag | Nail screw for producing a joint connection, and a joining method using the nail screw and a device for performing the joining process |
| US11105362B2 (en) | 2018-01-12 | 2021-08-31 | Triangle Fastener Corporation | Anti-burr threaded fastener |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1400911A1 (en) * | 1962-08-14 | 1969-01-30 | Ottaviano Traniello | screw |
| BE675809A (en) * | 1964-07-08 | 1966-06-16 | ||
| FR2582754B1 (en) * | 1985-05-31 | 1988-05-13 | Mustad Fils O | FIXING POINT FOR CORRUGATED SHEET PANELS, FIBROCEMENT OR THE LIKE |
-
1995
- 1995-12-15 GB GBGB9525624.4A patent/GB9525624D0/en active Pending
-
1996
- 1996-12-13 CA CA 2239473 patent/CA2239473A1/en not_active Abandoned
- 1996-12-13 EP EP96942474A patent/EP0866921A1/en not_active Withdrawn
- 1996-12-13 WO PCT/GB1996/003116 patent/WO1997022811A1/en not_active Application Discontinuation
- 1996-12-13 AU AU11852/97A patent/AU1185297A/en not_active Abandoned
- 1996-12-13 JP JP9522580A patent/JP2000502169A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB9525624D0 (en) | 1996-02-14 |
| WO1997022811A1 (en) | 1997-06-26 |
| EP0866921A1 (en) | 1998-09-30 |
| AU1185297A (en) | 1997-07-14 |
| JP2000502169A (en) | 2000-02-22 |
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