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NZ775414B2 - A screw fastener - Google Patents
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NZ775414B2 - A screw fastener - Google Patents

A screw fastener Download PDF

Info

Publication number
NZ775414B2
NZ775414B2 NZ775414A NZ77541417A NZ775414B2 NZ 775414 B2 NZ775414 B2 NZ 775414B2 NZ 775414 A NZ775414 A NZ 775414A NZ 77541417 A NZ77541417 A NZ 77541417A NZ 775414 B2 NZ775414 B2 NZ 775414B2
Authority
NZ
New Zealand
Prior art keywords
section
screw fastener
head
shank
diameter
Prior art date
Application number
NZ775414A
Other versions
NZ775414A (en
Inventor
Hugh Marshall Bryan
Anthony Camilleri Mark
Original Assignee
Illinois Tool Works Inc
Filing date
Publication date
Priority claimed from AU2017219062A external-priority patent/AU2017219062A1/en
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of NZ775414A publication Critical patent/NZ775414A/en
Publication of NZ775414B2 publication Critical patent/NZ775414B2/en

Links

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
    • F16B25/0052—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
    • 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
    • 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

Abstract

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.

Claims (10)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A screw fastener for driving into a substrate to fasten a fitting to the substrate, the screw fastener comprising: a head having a washer form, whereby, in use, the head is configured to sit tight against the fitting when the screw fastener is fastened to the substrate; an elongated shank extending from the head, the shank comprising an unthreaded first section proximate the head, a threaded second section, and a tapered portion, wherein the first section is located directly beneath the head and configured with a diameter greater than that of the threaded second section, the diameter of the first section is substantially constant along its length, and the tapered portion is located intermediate the first section and the second section and connects the first section and the second section, whereby the shank tapers, in a direction of a longitudinal axis of the shank, from the diameter of the first section to the diameter 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, whereby, in use, the plurality of edges is configured to provide a bore in the substrate corresponding to the diameter of the first section.
2. A screw fastener according to claim 1, wherein the plurality of edges is in the form of a plurality of boring edges for providing the bore in the substrate corresponding to the diameter of the first section.
3. The screw fastener according to claim 2, wherein the plurality of boring edges is in the form of a plurality of cutting edges for providing the bore in the substrate corresponding to the diameter of the first section.
4. The screw fastener according to any one of claims 1 to 3, wherein 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.
5. The screw fastener according to any one of claims 1 to 4, wherein the region is defined by adjacent parts of the first section and the tapered portion.
6. The screw fastener according to any one of claims 1 to 4, wherein said region is located at a part of the tapered portion adjacent the first section.
7. The screw fastener according to any one of claims 1 to 6, further comprising a flute extending towards the head from the plurality of edges.
8. The screw fastener according to any one of claims 1 to 7, wherein the angle of the tapered portion with respect to the longitudinal axis of the shank is about 30 degrees.
9. The screw fastener according to any one of claims 1 to 8, wherein an end portion of the shank is configured with a self-drilling tip.
10. The screw fastener according to any one of claims 1 to 9, wherein the fastener is configured for use with timber.
NZ775414A 2017-08-25 A screw fastener NZ775414B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2016903467A AU2016903467A0 (en) 2016-08-31 A screw fastener
AU2017219062A AU2017219062A1 (en) 2016-08-31 2017-08-24 A screw fastener
NZ734943A NZ734943B2 (en) 2017-08-25 A screw fastener

Publications (2)

Publication Number Publication Date
NZ775414A NZ775414A (en) 2024-10-25
NZ775414B2 true NZ775414B2 (en) 2025-01-28

Family

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