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NZ753151B2 - Threaded fastener - Google Patents
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NZ753151B2 - Threaded fastener - Google Patents

Threaded fastener

Info

Publication number
NZ753151B2
NZ753151B2 NZ753151A NZ75315117A NZ753151B2 NZ 753151 B2 NZ753151 B2 NZ 753151B2 NZ 753151 A NZ753151 A NZ 753151A NZ 75315117 A NZ75315117 A NZ 75315117A NZ 753151 B2 NZ753151 B2 NZ 753151B2
Authority
NZ
New Zealand
Prior art keywords
shank
fastener
head
helical thread
outer diameter
Prior art date
Application number
NZ753151A
Other versions
NZ753151A (en
Inventor
Stanley J Cabaj
Michael C Dill
Yongping Gong
Mark D Latz
Victor Truong
Original Assignee
Illinois Tool Works Inc
Filing date
Publication date
Priority claimed from US15/800,865 external-priority patent/US10570943B2/en
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to NZ794084A priority Critical patent/NZ794084B2/en
Publication of NZ753151A publication Critical patent/NZ753151A/en
Publication of NZ753151B2 publication Critical patent/NZ753151B2/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
    • 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
    • F16B25/0026—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 hard non-organic material, e.g. stone, concrete or drywall
    • 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
    • F16B25/0036—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
    • F16B25/0057—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 screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • 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
    • F16B25/0057—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 screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • F16B25/0063—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 screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections with a non-threaded portion on the shaft of the screw
    • 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
    • F16B25/0068—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 with multiple-threads, e.g. a double thread screws
    • 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
    • F16B25/0073—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 characterised by its pitch, e.g. a varying pitch
    • 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
    • F16B25/0078—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw with a shaft of non-circular cross-section or other special geometric features of the shaft
    • 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
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts

Abstract

fastener or screw or bolt driveable into a substrate. The fastener includes a head, a shank, and a helical thread formation. Portions of the shank and helical thread formations may be tapered. The outer diameter of the shank decreases in a direction away from the head. An outer diameter of the thread formation increases in a direction away from the head. The inventive concept is the increasing outer diameter of the helical thread and the tapering of the diameter of the third portion along the length of the shank in a direction along the longitudinal axis from the head to the tip. This allows the thread to distribute loads over a greater surface area within the substrate. Having the third portion shank tapers to a smaller diameter (away from the head) allows for reduced stress concentration. Whilst still maintaining the larger shank diameter adjacent to the head (first portion), this provides greater torsional strength for applying and removing the screw. These improvements reduce torsional failure of the fastener from over tightening.

Claims (18)

1. The invention is claimed as follows: 5 1. A fastener comprising: a head; a shank connected to the head at a first end and forming a tip at a second end, the shank having a first portion proximate the head, a second portion adjacent to the tip, and a third portion between the first and second portions, the shank having a 10 longitudinal axis extending from the head to the tip, the first portion having a substantially constant diameter along a length of the shank, the second portion having a substantially constant diameter along the length of the shank, and the third portion having a diameter that decreases along the length of the shank in a direction along the longitudinal axis from the head to the tip; and 15 a first helical thread formation having a thread form thereon formed from two portions disposed upon opposite lateral sides of the thread form, the thread form having a root, the root positioned along the second and third portions of the shank; wherein an outer diameter of the first helical thread formation on the third portion of the shank increases along the length of the third portion of the shank in a direction 20 along the longitudinal axis from the head to the tip.
2. The fastener of claim 1, wherein the outer diameter of the first helical thread formation is substantially constant on the second portion of the shank. 25
3. The fastener of claim 1 or claim 2, which includes a second helical thread formation between the first helical thread formation.
4. The fastener of claim 3, wherein an outer diameter of the second thread formation on the third portion of the shank increases along the length of the shank in a 30 direction along the longitudinal axis from the head to the tip.
5. The fastener of claim 3 or claim 4, wherein an outer diameter of the second helical thread formation is smaller than the outer diameter of the first helical thread formation. 5
6. The fastener of claim 1 or claim 2, which includes a plurality of second helical thread formations between the first helical thread formation.
7. The fastener of claim 6, wherein an outer diameter of the plurality of second helical thread formations is smaller than the outer diameter of the first helical thread 10 formation.
8. The fastener of claim 6, wherein an outer diameter of the plurality of second helical thread formations on the third portion of the shank increases along the length of the shank in a direction along the longitudinal axis from the head to the tip.
9. The fastener of claim 7, wherein the outer diameter of the plurality of second helical thread formations on the third portion of the shank increases along the length of the shank in a direction along the longitudinal axis from the head to the tip. 20
10. The fastener of any one of claims 1 to 9, wherein an outer surface of the third portion of the shank forms an angle a with the longitudinal axis.
11. The fastener of claim 10, wherein the outer diameter of the first helical thread formation on the third portion of the shank forms an angle ß with the longitudinal axis.
12. The fastener of claim 11, wherein a is approximately 1 degree, and ß is approximately 1 degree.
13. The fastener of any one of claims 1 to 12, wherein the head includes a top 30 portion distal from the shank, and a bottom portion adjacent to the shank, the top portion defining an engaging structure engageable by a tool, the bottom portion including a bottom surface and a plurality of ribs extending from the bottom surface arranged radially around an axis of the head, the ribs extending outward from the bottom surface in a direction towards the tip, the ribs configured to frictionally engage a face of an object attachable to a substrate into which the fastener is driven as the ribs approaches 5 and comes into contact with the object being attached to the substrate by the fastener.
14. The fastener of claim 13, wherein each of the plurality of ribs includes a leading face and a trailing face, wherein the leading face is configured to engage the face of the object as the fastener is driven into the substrate.
15. The fastener of claim 14, wherein the leading face forms an angle e1 with the bottom surface.
16. The fastener of claim 15, where in e1 is greater than 45 degrees and less than 15 90 degrees.
17. The fastener of any one of claims 13 to 16, wherein a portion of each of the plurality of ribs is connected to and extends along the first portion of the shank. 20
18. The fastener of claim 1, the fastener being substantially as hereinbefore described with reference to the accompanying drawings.
NZ753151A 2017-11-02 Threaded fastener NZ753151B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ794084A NZ794084B2 (en) 2017-11-02 Threaded fastener

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201662422978P 2016-11-16 2016-11-16
US15/800,865 US10570943B2 (en) 2016-11-16 2017-11-01 Threaded fastener
PCT/US2017/059662 WO2018093571A1 (en) 2016-11-16 2017-11-02 Threaded fastener

Publications (2)

Publication Number Publication Date
NZ753151A NZ753151A (en) 2025-02-28
NZ753151B2 true NZ753151B2 (en) 2025-06-04

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