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NZ794084B2 - Threaded fastener - Google Patents
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NZ794084B2 - Threaded fastener - Google Patents

Threaded fastener

Info

Publication number
NZ794084B2
NZ794084B2 NZ794084A NZ79408417A NZ794084B2 NZ 794084 B2 NZ794084 B2 NZ 794084B2 NZ 794084 A NZ794084 A NZ 794084A NZ 79408417 A NZ79408417 A NZ 79408417A NZ 794084 B2 NZ794084 B2 NZ 794084B2
Authority
NZ
New Zealand
Prior art keywords
fastener
shank
helical thread
head
thread formation
Prior art date
Application number
NZ794084A
Other versions
NZ794084A (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
Publication of NZ794084A publication Critical patent/NZ794084A/en
Publication of NZ794084B2 publication Critical patent/NZ794084B2/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

The fastener includes a head, a shank, and a helical thread formation. The helical thread formation is formed with a plurality of grooves that are respectively each partially defined by a straight cutting edge. The third portion of the fastener is tapered. The tapered third portion of the fastener increases in diameter in the direction of head to tip. The tapering on the third portion of the shank reduces the localized frictional torques applied to the third portion of the shank due to the decreased diameter of the thread formation having less contact surface with a substrate into which the fastener is driven. These improvements reduce torsional failure of the fastener from over tightening.

Claims (17)

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; and a first helical thread formation formed with a plurality of grooves that are respectively each partially defined by a straight cutting edge; wherein the first portion has a substantially constant diameter along a length of the shank, the second portion has a substantially constant diameter along the length of 15 the shank, and the third portion has a diameter that decreases along the length of the shank in a direction along the longitudinal axis from the head to the tip; and an outer diameter of the first helical thread formation 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.
2. The fastener of claim 1, wherein at least one of the grooves is defined by the straight cutting edge and a second edge that intersect at an acute angle along an intersection line. 25
3. The fastener of claim 1, which includes a second helical thread formation extending from the shank.
4. The fastener of claim 1, wherein the first helical thread formation has a thread form thereon formed from two portions disposed upon opposite lateral sides of the 30 thread form, the thread form having a root, the root positioned along the second and third portions of the shank; and wherein the head includes a top 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 5 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 and comes into contact with the object being attached to the substrate by the fastener.
5. The fastener of claim 4, wherein each of the plurality of ribs includes a leading 10 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.
6. The fastener of claim 5, wherein the leading face forms an angle e with the bottom surface.
7. The fastener of claim 6, wherein e is greater than 45 degrees and less than 90 degrees.
8. The fastener of claim 5, wherein a portion of each of the plurality of ribs is 20 connected to and extends along the first portion of the shank.
9. The fastener of claim 1, wherein an outer diameter of the first helical thread formation is substantially constant on the second portion of the shank. 25
10. The fastener of claim 3, wherein an outer diameter of the first helical thread formation is substantially constant on the second portion of the shank, and an outer diameter of the second helical thread formation is smaller than the outer diameter of the first helical thread formation. 30
11. The fastener of claim 1, which includes a plurality of second helical thread formations between the first helical thread formation.
12. The fastener of claim 11, wherein an outer diameter of the plurality of second helical thread formations is smaller than an outer diameter of the first helical thread formation.
13. The fastener of claim 1, wherein an outer surface of the third portion of the shank forms an angle a with the longitudinal axis.
14. The fastener of claim 1, wherein an outer diameter of the first helical thread 10 formation on the third portion of the shank forms an angle ß with the longitudinal axis.
15. The fastener of claim 14, wherein an outer diameter of the first helical thread formation on the third portion of the shank forms an angle ß with the longitudinal axis, the angle a is approximately 1 degree, and the angle ß is approximately 1 degree.
16. The fastener of claim 2, wherein the acute angle is approximately 60 degrees.
17. The fastener of claim 1, the fastener being substantially as hereinbefore described with reference to the accompanying drawings.
NZ794084A 2017-11-02 Threaded fastener NZ794084B2 (en)

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
NZ753151A NZ753151B2 (en) 2017-11-02 Threaded fastener

Publications (2)

Publication Number Publication Date
NZ794084A NZ794084A (en) 2025-02-28
NZ794084B2 true NZ794084B2 (en) 2025-06-04

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