WO2009076544A1 - Anti-back out fastener - Google Patents

Anti-back out fastener Download PDF

Info

Publication number
WO2009076544A1
WO2009076544A1 PCT/US2008/086456 US2008086456W WO2009076544A1 WO 2009076544 A1 WO2009076544 A1 WO 2009076544A1 US 2008086456 W US2008086456 W US 2008086456W WO 2009076544 A1 WO2009076544 A1 WO 2009076544A1
Authority
WO
WIPO (PCT)
Prior art keywords
fastener
head
washer
piece
shaft
Prior art date
Application number
PCT/US2008/086456
Other languages
French (fr)
Inventor
Michael S. Dudas
James V. Doerner
Original Assignee
Atlas Bolt & Screw Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Atlas Bolt & Screw Company filed Critical Atlas Bolt & Screw Company
Publication of WO2009076544A1 publication Critical patent/WO2009076544A1/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
    • 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
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • 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
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/95—Constructional details of connections not covered for in other groups of this subclass with markings, colours, indicators or the like
    • 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
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action

Definitions

  • the present invention relates to fasteners for use in construction, ami more, particularly to fasteners that resist back out.
  • FIG. 1 is a side elevatio ⁇ al view of an embodiment of the fastener of the presersi invention.
  • FIG. 2 is a side eievationai view of the fastener of Fig. I w ⁇ h the washer removed for i! kistrati ve purposes.
  • FIG. 3 is a side clevaiional view of the fastener of Fig, 1 with a portion of the fas terser head cut-away for illustrative purposes.
  • FIG. 4 is mi bottom plan view of the fastener of Fig. I, w ⁇ h the head and washer deu ⁇ is shown in dashed lir.es. DESCRIPTION OF EMBODIMENTS
  • fasteners of the present invention are described below in terms of use for use with metal panels and purlins of the metal building industry, it is understood that the fastener could be used to secure other pieces together and with materials other than metal.
  • materials include., but are not limited to. wood, plastic, concrete, and composite materials.
  • the fastener of (he present invention is indicated in general ai K in Figs. 1-4.
  • the fastener includes a screw having lock nibs and a washer.
  • the screw aspect of the illustrated fastener 8 has two primary components, a head 10 and a shaft 12.
  • the shaft ⁇ l has two regions of varying diameter: the tip region 14 and the thread region 16.
  • the tip region 14 forms the t « ⁇ ered distal end of the shaft.
  • the tip region is preferably a self-drilling point for drilling a hole into a materia! as the screw is inserted therein.
  • the thread region 16 is located along t.he shaft shove the tip region.
  • the thread region has threads 17 thai grip the material into which the screw is inserted.
  • the threads can be configured in any suitable manner known in the an, such as. for example, ars inverted buUress design.
  • the head 10 of the screw is preferably an indented head having a driver portion IS, a crown 20, and a lower surface 22.
  • the driver portion of the head of the screw is preferably hexagonal. More preferably, the driver portion of the head is preferably a 5/16 inch hexagonal head having an indentation 24 on the upper surface thereof. It is believed thai the indentation facilitates improved engagement with a socket. It should be underwood, however, that other head types can also be employed, such as, for example, a square head, a Phillips head, or flat head,
  • the crown extends around the perimeter of the head.
  • the tower surface 22 of the head preferably has an undercut 25.
  • Lock nibs 26a-26d are formed in the head i0 of the fastener and are located under the crown 20 and preferably within the undercut 25 of the lower surface 22.
  • the lock nibs 26a- 26d feature a generally triangular profile with one side having ⁇ shorter length and sleeper laper than the other, As a result, the lock nibs allow t.he fastener to turn clockwise over a washer 28 without resistance as the lock nib sides with (he more gradual taper (and greater length) pass or slide over the washer.
  • lock nibs however, wiH dig into the washer if backed out or turned hi a counter-clockwise direction, as the skies of the lock nibs featuring a steeper taper engage the washer, thus resisting fastener back out
  • lock nibs featuring a generally triangular shape are shown, other shapes may be used, as long us die lock nibs feature the "one-way" action described immediately above.
  • lock nibs are at least two lock nibs in the fastener.
  • the lock nibs are preferably located at a 9(F angle or a 180° angle with respect to each other
  • the core materia! of the screw >s preferably carbon steel.
  • the driver portion of the head is preferably a cast zinc alloy.
  • the shaft is preferably a sr.ine plated shaft having a thickness of at least about 0,005 inches.
  • the washer 28 is preferably rubber, such as, for example, EPDM.
  • Use washer preferably has an upper portion that is entrapped within the undercut of the head of the screw,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

An anti-back out fastener includes a head featuring a lower surface and a shaft connected to the lower surface. The shaft features a thread portion and a tip region including a.seif-dnlimg point forming the distal end of the shall. The head also features a driver portion and the lower surface has an undercut formed therein with a number of locking nubs and a washer positioned therein. The locking nubs are shaped to pass over the washer when the fastener is rotated hi a first direction and dig into the washer when an attempt is made to rotate the fastener in a second direction.

Description

ANIl-BACK OUT FASTENER
CLAIM OF PRIORITY
HM)OlJ This application claims priority from U.S. Provisional Patent Application Serial No. 61/007,236, filed December 1 1 , 2007, currently pending.
BACKGROUND
[0002] The present invention relates to fasteners for use in construction, ami more, particularly to fasteners that resist back out.
HMMB! In the building industry, and particularly in the metal building industry, self drilling., self tapping fasteners may back om of a building after installation. This occurs because, over ume, such fasteners can loosen and pull out of their originally fixed positions. This is a problem known as fastener back out, and, although not being bound by any particular theory, it is believed that this back out is caused by internal and/or external vibrations,
BRIEF DESCRIPTION OF THE DRAWINGS
[00041 Fig. 1 is a side elevatioπal view of an embodiment of the fastener of the presersi invention.
[001)51 Fig. 2 is a side eievationai view of the fastener of Fig. I wήh the washer removed for i! kistrati ve purposes.
[00061 Fig. 3 is a side clevaiional view of the fastener of Fig, 1 with a portion of the fas terser head cut-away for illustrative purposes.
|O0O7 J Fig. 4 is mi bottom plan view of the fastener of Fig. I, wύh the head and washer deuύis shown in dashed lir.es. DESCRIPTION OF EMBODIMENTS
[0008] While fasteners of the present invention are described below in terms of use for use with metal panels and purlins of the metal building industry, it is understood that the fastener could be used to secure other pieces together and with materials other than metal. Such materials include., but are not limited to. wood, plastic, concrete, and composite materials.
[00091 An embodiment of the fastener of (he present invention is indicated in general ai K in Figs. 1-4. As will be explained in greater detail, below, the fastener includes a screw having lock nibs and a washer.
[00103 A-s illustrated in Figs. 1-4, the screw aspect of the illustrated fastener 8 has two primary components, a head 10 and a shaft 12. As illustrated in Pig, 2, the shaft ϊl has two regions of varying diameter: the tip region 14 and the thread region 16. The tip region 14 forms the t«ρered distal end of the shaft. The tip region is preferably a self-drilling point for drilling a hole into a materia! as the screw is inserted therein. 'The thread region 16 is located along t.he shaft shove the tip region. The thread region has threads 17 thai grip the material into which the screw is inserted. The threads can be configured in any suitable manner known in the an, such as. for example, ars inverted buUress design.
[001 Il As illustrated in Fig. 3, the head 10 of the screw is preferably an indented head having a driver portion IS, a crown 20, and a lower surface 22. The driver portion of the head of the screw is preferably hexagonal. More preferably, the driver portion of the head is preferably a 5/16 inch hexagonal head having an indentation 24 on the upper surface thereof. It is believed thai the indentation facilitates improved engagement with a socket. It should be underwood, however, that other head types can also be employed, such as, for example, a square head, a Phillips head, or flat head, The crown extends around the perimeter of the head. The tower surface 22 of the head preferably has an undercut 25.
{0012} Lock nibs 26a-26d (Figs. 2-4) are formed in the head i0 of the fastener and are located under the crown 20 and preferably within the undercut 25 of the lower surface 22. A>- best illustrated in Figs. 3 and 4. the lock nibs 26a- 26d feature a generally triangular profile with one side having α shorter length and sleeper laper than the other, As a result, the lock nibs allow t.he fastener to turn clockwise over a washer 28 without resistance as the lock nib sides with (he more gradual taper (and greater length) pass or slide over the washer. The lock nibs, however, wiH dig into the washer if backed out or turned hi a counter-clockwise direction, as the skies of the lock nibs featuring a steeper taper engage the washer, thus resisting fastener back out While lock nibs featuring a generally triangular shape are shown, other shapes may be used, as long us die lock nibs feature the "one-way" action described immediately above.
100131 Preferably, (here are at least two lock nibs in the fastener. In such embodiments, the lock nibs are preferably located at a 9(F angle or a 180° angle with respect to each other In ihe embodiment of die fastener of the present invent ion illustrated in Figs, 1-4, there are four lock nibs located at a 90" angle with respect to each other,
[00.141 The core materia! of the screw >s preferably carbon steel. The driver portion of the head is preferably a cast zinc alloy. The shaft is preferably a sr.ine plated shaft having a thickness of at least about 0,005 inches.
((K)JS] The washer 28 is preferably rubber, such as, for example, EPDM. Use washer preferably has an upper portion that is entrapped within the undercut of the head of the screw,
{0016] When an ana-back out fastener of the present invention is inserted into a metal roof. sidewaJS or other piece, for example, the rubber washer 28 will bond to the metal of the roof or sidewall. Fasteners of the present invention were designed to utilize the adhesion of the washer to a nietai panel, and, in conjunction with the lock nibs, resist back oώ.
{0017] From the foregoing, il will be appreciated that although specific embodiments of the invention have been described herein for purposes of illustration, various modifications may be made without deviating from the spirit or scope of the invention, it is therefore intended that die foregoing detailed description be regarded as illustrative rather than limiting, and that n he understood that it is the following claims, including all equivalents, that are intended to particularly point out and distinctly claim the subject matter regarded as the invention.

Claims

CLAIMS WIlAT IS CLAIM]JD LS:
1 , An fastener for securing a first piece LQ a second piece comprising; a} a head; h) a shaft connected to the head and featuring a thread region adapted to engage die second piece; c) a kicking rhh positioned on the head and adjacent to the shaft; d) a washer at least partially surrounding the shaft and positioned adjacent to the locking nub of the head; and e) said locking nub shaped to permit the head to be rotated with respect to the first piece in a first direction whereby the thread region of the shaft further engages second piece, said locking nub shape also causing the locking rmb to engage washer as the washer engages the first piece when rotation of the head in a see?. direction opposite of the first direction is attempted so that rotation of the head the second direction is substantially prevented.
2, The fastener of claim 1. wherein the first direction is clockwise and the second direction is counter-clockwise.
3, The fastener of claim 1 wherein the head includes lower surface with an undercut formed therein, and said locking nub positioned within the undercut.
4. The fastener of claim 3 wherein the washer is also at least partially poskioneά within the undercut of the head.
5. "The fastener of claim 3 wherein the head also includes a crown covering Use undercut.
6. The fastener of claim 4 wherein the head also includes a driver portion surrounded by the crown.
7. The fastener of claim 3 wherein the head also includes a driver portion.
8. The fastener of claim 7 wherein the driver portion is hexagonal shaped.
9. "file fastener of claim 7 wherein the driver portion includes an indentation.
10. The fasienεr of claim .1 further comprising a rip region forming a ύhitύ end of the shall
11. The fastener of claim Ii) wherein the tip region includes a self-drilling point
12., The fastener of claim 1 wherein the locking nub features a generally triangular profile with one side having a steeper taper than the other.
13. The fastener of claim 1 wherein the washer Ls made of rubber.
14. The fastener of claim 1 wherein the fastener is constructed with a core material of carbon sled with the head cast of zinc alloy and the shaft zinc plated.
15. The fastener of claim i wherein the first piece is constructed of metal
16. A fastener comprising: a) a heat! featuring a lower surface; h) a shaft connected to the lower surface featuring a thread portion; c) a plurality of locking rmbs positioned on the lower surface of the head; d) a washer positioned substantially around the shaft and positioned adjacent to the Sower surface of the head; and e) said locking nubs shaped to pass over the washer when the fastener is rotated in a first direction and to dig into the washer when an attempt is made to rotate the fastener in a second direction*
17. The fastener of claim 16 wherein the head lower surface has an undercut formed therein, arsd said locking nub and washer are positioned within the undercut.
18. -'The fastener of claim 16 wherein the plurality of locking nubs include torn nubs equally-spaced and positioned 9(P from one another.
19. The fastener of claim 16 further comprising a Up region including a self-drilling point forming a disuU end of the shall,
20. The fastener of claim 16 wherein the head includes a driver portion.
PCT/US2008/086456 2007-12-11 2008-12-11 Anti-back out fastener WO2009076544A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US723607P 2007-12-11 2007-12-11
US61/007,236 2007-12-11

Publications (1)

Publication Number Publication Date
WO2009076544A1 true WO2009076544A1 (en) 2009-06-18

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ID=40755887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/086456 WO2009076544A1 (en) 2007-12-11 2008-12-11 Anti-back out fastener

Country Status (1)

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WO (1) WO2009076544A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3045740A1 (en) * 2015-01-19 2016-07-20 BTS BauTechnischeSysteme GmbH & Co. KG Fastening device for fastening a component to a thermal insulation composite system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295767A (en) * 1979-11-26 1981-10-20 Temple Jr John W Corrosion resistant fastener
US5622464A (en) * 1995-08-22 1997-04-22 Illinois Tool Works Inc. Screw with increased driving resistance at proper depth
US20060002784A1 (en) * 2004-07-01 2006-01-05 Curtis David A W Fastener apparatus for roofing and steel building construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295767A (en) * 1979-11-26 1981-10-20 Temple Jr John W Corrosion resistant fastener
US5622464A (en) * 1995-08-22 1997-04-22 Illinois Tool Works Inc. Screw with increased driving resistance at proper depth
US20060002784A1 (en) * 2004-07-01 2006-01-05 Curtis David A W Fastener apparatus for roofing and steel building construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3045740A1 (en) * 2015-01-19 2016-07-20 BTS BauTechnischeSysteme GmbH & Co. KG Fastening device for fastening a component to a thermal insulation composite system

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