AU2021101732B4 - A screw fastener - Google Patents
A screw fastener Download PDFInfo
- Publication number
- AU2021101732B4 AU2021101732B4 AU2021101732A AU2021101732A AU2021101732B4 AU 2021101732 B4 AU2021101732 B4 AU 2021101732B4 AU 2021101732 A AU2021101732 A AU 2021101732A AU 2021101732 A AU2021101732 A AU 2021101732A AU 2021101732 B4 AU2021101732 B4 AU 2021101732B4
- Authority
- AU
- Australia
- Prior art keywords
- section
- screw fastener
- shank
- head
- edges
- 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.)
- Active
Links
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 238000005553 drilling Methods 0.000 description 15
- 239000011121 hardwood Substances 0.000 description 3
- 239000011122 softwood Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
- F16B35/065—Specially-shaped heads with self-countersink-cutting means
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/048—Specially-shaped necks
-
- 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
- F16B25/0052—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 having indentations, notches or the like in order to improve the cutting behaviour
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Drilling Tools (AREA)
- Dowels (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A screw fastener for driving into a substrate, comprising a head and an elongated shank
extending from the head, the shank comprising a first section proximate the head, a threaded
second section, and a tapered portion connecting the first and the threaded second sections
of the shank, wherein the first section is configured with a diameter greater than that of the
second section; and a plurality of edges defined substantially about a perimeter of a region
of the shank between the head and the threaded second section for providing a bore in the
substrate corresponding to the diameter of the first section.
Description
A Screw Fastener
This is a divisional of Australian Patent Application No. 2017219062, the entire contents of which are incorporated herein by reference.
The invention relates to a screw fastener, and in particular, to a self-drilling screw fastener for use with timber substrates.
Self-drilling screws are known for fastening a wide variety of fittings to timber substrates. The threaded configuration and drilling point of a conventional self-drilling screw is typically designed to be screwed into the timber with its head sitting flush against the fitting. However, conventional self-drilling screws are not designed to withstand high shear stress forces in use and are therefore not suitable for use in fastening applications in which the screws would be subjected to high shear stress forces, such as fastening post supports and stair tread brackets to timber substrates.
The applicant has determined that it would be advantageous to provide an improved screw fastener for coping with greater shear forces when installed. The present invention, in its preferred embodiments, seeks to at least in part alleviate the above-identified problem.
The present invention provides a screw fastener for driving into a substrate, when used to fasten a fitting to the substrate, wherein a post comprises the substrate and the fitting is a post support bracket, the fastener comprising: a head and an elongated shank extending from the head, the shank comprising a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, wherein the first section is configured with a diameter greater than that of the threaded second section; and a plurality of edges defined substantially about a perimeter of a region of the shank between the head and the threaded second section for providing a bore in the substrate corresponding to the diameter of the first section; wherein the first section is located proximate the post support bracket and the bore in the substrate.
The present invention provides the use of a screw fastener to fasten a post support bracket to a post, the fastener comprising: a head; an elongated shank extending from the head; and a plurality of edges; wherein the shank comprises a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, and the first section is configured with a diameter greater than that of the threaded second section, the plurality of edges being defined substantially about a perimeter of a region of the shank between the head and the threaded second section; the use comprising driving the screw fastener into the post such that the plurality of edges provide a bore whereby the first section is embedded within the post, the bore corresponding to the diameter of the first section.
The present invention still further provides the use of a first screw fastener and a second screw fastener to fasten a post support bracket to a post, each of the first screw fastener and the second screw fastener comprising: a head; an elongated shank extending from the head; and a plurality of edges; wherein the shank comprises a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, and the first section is configured with a diameter greater than that of the threaded second section, the plurality of edges being defined substantially about a perimeter of a region of the shank between the head and the threaded second section; the use comprising: driving the first screw fastener in a first direction into the post such that the plurality of edges of the first screw fastener provide a bore whereby the first section of the first screw fastener is embedded within the post, that bore corresponding to the diameter of the first section of the first screw fastener; driving the second screw fastener in a second direction into the post such that the edges of the second screw fastener provide a bore whereby the first section of the second screw fastener is embedded within the post, that bore corresponding to the diameter of the first section of the second screw fastener, the first direction being opposite to the second direction.
The plurality of edges of the or each screw fastener may be in the form of a plurality of boring edges.
The plurality of edges of the or each screw fastener may be in the form of a plurality of cutting edges.
The or each screw fastener may be a self-drilling screw fastener.
Also disclosed herein is a screw fastener for driving into a substrate, comprising: a head and an elongated shank extending from the head, the shank comprising a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, wherein the first section is configured with a diameter greater than that of the threaded second section; and a plurality of edges defined substantially about a perimeter of a region of the shank between the head and the threaded second section for providing a bore in the substrate corresponding to the diameter of the first section.
Preferably, the plurality of edges are in the form of a plurality of boring edges for providing the bore in the substrate corresponding to the diameter of the first section. More preferably, the plurality of boring edges is in the form of a plurality of cutting edges.
In a preferred form, the plurality of edges are spaced equally about the perimeter of the region of the shank between the head and the threaded section for providing the bore in the substrate corresponding to the diameter of the first section. In a particular form, the plurality of edges is in the form of four edges spaced equally about the perimeter of the region of the shank between the head and the threaded section for providing the bore in the substrate corresponding to the diameter of the first section.
There is also disclosed a screw fastener, comprising a screw fastener for driving into a substrate, comprising a head and an elongated shank extending from the head, the shank comprising a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the threaded second sections of the shank, wherein the first section is configured with a diameter greater than that of the second section; and one or more cutting edges defined substantially about a perimeter of a cutting region of the shank between the head and the threaded second section for providing a bore in the substrate corresponding to the diameter of the first section.
Preferably, the cutting region is defined by adjacent parts of the first section and the tapered portion.
Preferably, the screw fastener further comprises a flute extending towards the head from the one or more cutting edges.
Preferably, the first section is of substantially constant diameter along its length.
Preferably, the angle of the tapered portion with respect to the longitudinal axis of the shank is about 30 degrees.
Preferably, an end portion of the shank is configured with a self-drilling tip.
Preferably, the fastener is configured for use with timber.
There is also disclosed a screw fastener, comprising a self-drilling screw fastener for driving into a substrate, comprising a head and an elongated shank extending from the head, the shank comprising a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, wherein the first section is configured with a diameter greater than that of the second section; one or more cutting edges defined substantially about a perimeter of a cutting region of the shank between the head and the threaded second section for providing a bore in the substrate corresponding to the diameter of the first section, wherein the cutting region is located at a part of the tapered portion adjacent the first section.
Further aspects of the present invention and further embodiments of the aspects described in the preceding paragraphs will become apparent from the following description.
In the description in this specification, reference may be made to subject matter which is not within the scope of the appended claims. That subject matter should be readily identifiable by a person skilled in the art and may assist in putting into practice the invention as defined in the presently appended claims.
The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a rendered front view showing a screw fastener according to an embodiment of the present invention; Figure 2 is a rendered partial close up view showing a cutting region of the screw fastener of Figure 1; Figure 3 is a rendered side perspective view showing the head and shank of the screw fastener of Figure 1; Figure 4 is a front view showing a screw fastener of Figure 1; Figure 5 is a top perspective view showing the screw fastener of Figure 1; Figure 6 is a bottom perspective view showing the screw fastener of Figure 1; Figure 7 is a rendered front view showing a screw fastener according to another embodiment of the present invention; Figure 8 is a rendered side perspective view showing the head and shank of the screw fastener of Figure 7; Figure 9 is a rendered perspective view showing a post support bracket fastened with the screw fastener of Figure 7; and Figure 10 is a rendered partial sectional view of the post support of Figure 9 showing the screw fastener of Figure 7 in use.
Figures 1 to 10 show preferred embodiments of screw fasteners 1 for use in fastening metal fittings such as brackets, post supports and stair tread brackets to timber substrates. More specifically, with reference to Figure 1, a fastener 1 comprises a head 10 and an elongated shank 20 extending from the head 10 for drilling into the substrate. The shank 20 has a first section 22 proximate the head 10 (referring to the portion of the shank 20 below the head ), a threaded second section 26 and an intermediate portion 24 joining the first and second sections 22, 26 of the shank 20.
The first section 22 of the shank 20 is configured with a diameter that is greater than the diameter of the threaded second section 26. In some configurations, the first section 22 of the shank 20 has a substantially constant diameter through its length, while in other configurations the diameter of the first section 22 may be varied. It is understood that having a greater amount of fastener material in the first section 22 of the shank 20 (located immediately below the head 10) advantageously provides the fastener 1 with greater strength properties. In particular, the section of the shank 20 directly beneath the head 10 is subject to high concentrations of shear stress forces in use, and therefore increasing the diameter of the first section 22 would lead to improved shear stress force performance of the fastener 1 under load. In one configuration, the intermediate portion 24 connecting the two shank sections 22, 26 is a tapered portion, in which the tapered portion 24 gradually tapers, in the direction of the shank's longitudinal axis, from the larger diameter of the first section 22 to join with that of the second sections 26. In some configurations, as shown in Figure 4, the angle 0 of the tapered portion with respect to the longitudinal axis of the shank is about 30 degrees. This relatively low taper angle facilitates a gradual transition between the two different-sized sections 22, 26 of the shank 20, thereby reducing the torque required to drive the fastener as well as reducing the likelihood of splitting the substrate during use. In another configuration, the connection between the tapered portion 24 and the threaded second section 26 is provided with a radial bend to reduce any sharp transitions between the said parts of the shank 20.
While a shank 20 with a larger first section 22 is designed to provide greater strength and shear force tolerance, the use of the fastener 1 with the larger first section 22, in the context of a self-drilling screw fastener (for use without pre-drilled holes), could potentially split or damage the substrate. Therefore, one or more cutting edges 32 are defined substantially about a perimeter of a cutting region 30 of the shank 20 between the head 10 and the threaded second section 26 for providing a bore in the substrate corresponding to the diameter of the first section 22 during use, so that the larger first section 22 can be embedded within the substrate with a reduced risk of splitting or damaging the substrate. This may also advantageously assist the head 10 to self-align and seat tight against the fitting as the screw is fastened into the substrate. It is therefore to be appreciated that the larger first section 22 and the cutting edges 32 of the cutting region 30 work synergistically to provide a workable self-drilling screw fastener with greater shear force tolerance properties.
Referring to Figure 2, the cutting region 30 is defined by adjacent parts of the first section 22 and the tapered portion 24. The one or more cutting edges 32 are defined between a cavity 34 of the cutting region 30 and the outer surface of the shank 20. For a clockwise fastening screw, the cutting edges 32 are located on the right with the cavity 34 on the left side for storing displaced substrate. This configuration is reversed for an anti-clockwise fastening screw. In one configuration, a flute 36 extends from one or more of the cutting edges 32 for guiding and/or storing displaced substrate. Although the embodiment with flutes 36 is preferred for use with all suitable timber substrates, including softwood and hardwood, embodiments without flutes 36 is preferred to be used with softwood. While a preferred embodiment of the fastener is provided with four cutting edges 32 spaced equally about the perimeter of the cutting region 30 (partially shown in the Figures), it is to be appreciated that the fastener can be configured with one or any suitable numbers of cutting edges 32. In addition to the cutting edges 32 being defined by a cavity 34 of the cutting region 30, it is to be appreciated that the cutting edges 32 can be of any other suitable form, with non-limiting examples including cutting threads and teeth. In some embodiments, the cutting region can be located at apart of the tapered portion 24 adjacent the first section 22.
In further embodiments, the threaded second section 26 is provided with cutting threads 28. In one configuration, the cutting threads 28 are serrated to reduce the drilling torque required to screw the fastener during use. An end portion 29 of the shank 20 is provided with a self drilling tip so that a pre-drilled hole is not required. The head 10 can be in the form of a flat washer, disc or of any other suitable form, and configured with a cap 12 and/or a drive recess/socket 14, for example in the form of a star drive recess/socket as depicted in Figure 3, for receiving suitable corresponding screw drivers.
Figures 7 to 8 depicts a further embodiment in which the threaded second section 26 is preceded by a length-extending portion 27 located intermediate the tapered portion 24 and the second section 26. In this embodiment, the tapered portion 24joins the first section 22 and the extended portion 27. The extended portion 27 has a diameter smaller than the first section but greater than the threaded second section 26. A second tapered portion 27A can be provided to connect the extended portion 27 and the second section 26.
Figures 9 to 10 show screw fasteners 1 as depicted in Figures 7 to 8 being fastened to a post bracket 2 through a hardwood substrate 3. It is to be appreciated that the enlarged first section 22 of the fastener 1 is located proximate the bracket 2 and the bore hole for providing improved strength in this area under shear force loading.
It is to be noted that the above-described features of a enlarged first section 22 of the shank with a cutting region 30 are not only suitable for a self-drilling screw fastener, it is equally suitable for non-self-drilling screws, with a non-limiting example such as coach screws. Further, preferred embodiments of the fastener 1 is not only suitable for use with timber substrates as described (including softwood and hardwood), it is equally suitable for use with other construction substrates.
In the description and drawings of this embodiment, same reference numerals are used as have been used in respect of the first embodiment, to denote and refer to corresponding features.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It will be apparent to a person skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the present invention should not be limited by any of the above described exemplary embodiments.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
Claims (5)
1. A screw fastener for driving into a substrate, when used to fasten a fitting to the substrate, wherein a post comprises the substrate and the fitting is a post support bracket, the fastener comprising: a head and an elongated shank extending from the head, the shank comprising a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, wherein the first section is configured with a diameter greater than that of the threaded second section; and a plurality of edges defined substantially about a perimeter of a region of the shank between the head and the threaded second section for providing a bore in the substrate corresponding to the diameter of the first section; wherein the first section is located proximate the post support bracket and the bore in the substrate.
2. Use of a screw fastener to fasten a post support bracket to a post, the fastener comprising: a head; an elongated shank extending from the head; and a plurality of edges; wherein the shank comprises a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, and the first section is configured with a diameter greater than that of the threaded second section, the plurality of edges being defined substantially about a perimeter of a region of the shank between the head and the threaded second section; the use comprising driving the screw fastener into the post such that the plurality of edges provide a bore whereby the first section is embedded within the post, the bore corresponding to the diameter of the first section.
3. Use of a first screw fastener and a second screw fastener to fasten a post support bracket to a post, each of the first screw fastener and the second screw fastener comprising: a head; an elongated shank extending from the head; and a plurality of edges; wherein the shank comprises a first section proximate the head, a threaded second section, and a tapered portion connecting the first and the second sections of the shank, and the first section is configured with a diameter greater than that of the threaded second section, the plurality of edges being defined substantially about a perimeter of a region of the shank between the head and the threaded second section; the use comprising: driving the first screw fastener in a first direction into the post such that the plurality of edges of the first screw fastener provide a bore whereby the first section of the first screw fastener is embedded within the post, that bore corresponding to the diameter of the first section of the first screw fastener; driving the second screw fastener in a second direction into the post such that the edges of the second screw fastener provide a bore whereby the first section of the second screw fastener is embedded within the post, that bore corresponding to the diameter of the first section of the second screw fastener, the first direction being opposite to the second direction.
4. The screw fastener according to claim 1 or the use according to claim 2 or claim 3, wherein the plurality of edges of the or each screw fastener is in the form of a plurality of boring edges.
5. The screw fastener according to claim 1 or the use according to claim 2 or claim 3, wherein the plurality of edges of the or each screw fastener is in the form of a plurality of cutting edges.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2021101732A AU2021101732B4 (en) | 2016-08-31 | 2021-04-05 | A screw fastener |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2016903467A AU2016903467A0 (en) | 2016-08-31 | A screw fastener | |
AU2016903467 | 2016-08-31 | ||
AU2017219062A AU2017219062A1 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
AU2021101732A AU2021101732B4 (en) | 2016-08-31 | 2021-04-05 | A screw fastener |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2017219062A Division AU2017219062A1 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2021101732A4 AU2021101732A4 (en) | 2021-05-20 |
AU2021101732B4 true AU2021101732B4 (en) | 2022-01-20 |
Family
ID=61568918
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2017219062A Pending AU2017219062A1 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
AU2017101929A Active AU2017101929B4 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
AU2021101732A Active AU2021101732B4 (en) | 2016-08-31 | 2021-04-05 | A screw fastener |
AU2022204548A Pending AU2022204548A1 (en) | 2016-08-31 | 2022-06-28 | A screw fastener |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2017219062A Pending AU2017219062A1 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
AU2017101929A Active AU2017101929B4 (en) | 2016-08-31 | 2017-08-24 | A screw fastener |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2022204548A Pending AU2022204548A1 (en) | 2016-08-31 | 2022-06-28 | A screw fastener |
Country Status (2)
Country | Link |
---|---|
AU (4) | AU2017219062A1 (en) |
NZ (1) | NZ734943A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4878793A (en) * | 1987-09-08 | 1989-11-07 | Itw, Ltd. | Screw threaded fastener |
US20050226701A1 (en) * | 2004-04-09 | 2005-10-13 | Craven Arnold R | Screw having a knurled portion |
EP2306032B1 (en) * | 2009-10-02 | 2014-04-09 | Adolf Würth GmbH & Co. KG | Fastening element |
US9016995B1 (en) * | 2013-08-02 | 2015-04-28 | Ronald John Janowicz, Sr. | Self-countersinking fastener |
CA2833847A1 (en) * | 2013-11-20 | 2015-05-20 | Shu-Chin Huang | Screw capable of easily drilling holes and dregs removing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1235626A (en) * | 1917-02-28 | 1917-08-07 | Charles Daniel Woodward | Screw. |
US4697969A (en) * | 1985-09-06 | 1987-10-06 | Sparkes Wilford S | Wood screw |
-
2017
- 2017-08-24 AU AU2017219062A patent/AU2017219062A1/en active Pending
- 2017-08-24 AU AU2017101929A patent/AU2017101929B4/en active Active
- 2017-08-25 NZ NZ734943A patent/NZ734943A/en unknown
-
2021
- 2021-04-05 AU AU2021101732A patent/AU2021101732B4/en active Active
-
2022
- 2022-06-28 AU AU2022204548A patent/AU2022204548A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4878793A (en) * | 1987-09-08 | 1989-11-07 | Itw, Ltd. | Screw threaded fastener |
US20050226701A1 (en) * | 2004-04-09 | 2005-10-13 | Craven Arnold R | Screw having a knurled portion |
EP2306032B1 (en) * | 2009-10-02 | 2014-04-09 | Adolf Würth GmbH & Co. KG | Fastening element |
US9016995B1 (en) * | 2013-08-02 | 2015-04-28 | Ronald John Janowicz, Sr. | Self-countersinking fastener |
CA2833847A1 (en) * | 2013-11-20 | 2015-05-20 | Shu-Chin Huang | Screw capable of easily drilling holes and dregs removing |
Also Published As
Publication number | Publication date |
---|---|
AU2017101929A4 (en) | 2022-08-04 |
AU2022204548A1 (en) | 2022-07-21 |
AU2021101732A4 (en) | 2021-05-20 |
AU2017101929B4 (en) | 2023-04-13 |
NZ734943A (en) | 2023-12-22 |
AU2017219062A2 (en) | 2022-07-21 |
AU2017219062A1 (en) | 2018-03-15 |
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