WO2012146283A1 - Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres - Google Patents

Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres Download PDF

Info

Publication number
WO2012146283A1
WO2012146283A1 PCT/EP2011/056710 EP2011056710W WO2012146283A1 WO 2012146283 A1 WO2012146283 A1 WO 2012146283A1 EP 2011056710 W EP2011056710 W EP 2011056710W WO 2012146283 A1 WO2012146283 A1 WO 2012146283A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
thread
external thread
screw
composite material
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.)
Ceased
Application number
PCT/EP2011/056710
Other languages
English (en)
Inventor
Lars KASPERSSON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRIXTER AB
Original Assignee
TRIXTER AB
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 TRIXTER AB filed Critical TRIXTER AB
Priority to PCT/EP2011/056710 priority Critical patent/WO2012146283A1/fr
Publication of WO2012146283A1 publication Critical patent/WO2012146283A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"
    • F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
    • F16B37/127—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded and self-tapping
    • 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
    • F16B25/0047—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 being characterised by its cross-section in the plane of the shaft axis
    • 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
    • F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing

Definitions

  • the present invention relates to a method and a device for fastening an object in a fiber-reinforced composite material.
  • fiber-reinforced plastic also called fiberglass.
  • Fiberglass is a material with many uses, including boats, automo- biles and similar. Fiberglass comprises a plastic matrix, which plastic matrix may be epoxy, a thermoplastic or a thermosetting plastic, such as polyester or vinylester. When used for the body or hull or other parts of boats the fiberglass can be coated with a conventional gelcoat.
  • screws are commonly used for fastening an object in a fiber-reinforced composite material, such as for fastening objects to fiberglass parts on a boat.
  • Such screws can be arranged in stainless steel and can comprise a substantially cylindrical body provided with a thread and a head to be engaged by a tool.
  • a hole is drilled in the material, wherein the screw is screwed into the hole and brought into contact with the object to be fastened in a conventional manner.
  • Another problem of such prior art devices and methods is that it is diffi- cult to repeatedly use the same hole for the same or different objects to be fastened. For example, some objects are fastened during use and are removed for storage or similar when not in use for a longer time period. Such an object cannot easily be fastened at the same place as before as the holes previously used are damaged or do not engage the screws properly. To be able to use the same hole again the material must be repaired, which is time consuming, expensive and can result in a less durable and strong material for the object to be fastened in. Alternatively, a hole having a substantially larger diameter can be drilled, wherein a considerably larger screw must be used. Drilling a larger hole and using a larger screw may not always be an option and is not a suitable solution for repeated fastening and removal.
  • One object of the present invention is to eliminate the above mentioned problems and provide a method and a device for secure and reliable fastening an object in a fiber-reinforced composite material, also when subject to repeated fastening and removal of the object at the same position.
  • One further object of the present invention is to make it possible to provide a secure and reliable fastening in a position in which there is an existing hole for a conventional fastening screw, wherein the material around said existing hole may be damaged.
  • the invention relates to a method for fastening an object in a fiber- reinforced composite material, comprising the steps of
  • the device having a body, en external thread extending from said body and an axial bore with an internal thread, wherein the diameter of the hole is arranged larger than the diameter of the body to form a gap between the material in the hole and the body when the device is inserted in the hole,
  • the thread of the device can primarily be for fixing the device while the adhesive is setting.
  • the thread of the device is only partially en- gaged with the material, wherein the thread is a minor part of the final fastening of the device and the adhesive forms the major fastening of the device after setting.
  • the thread can form an enlarged contact surface between the device and the adhesive.
  • the adhesive can at least partially or entirely fill the gap between the material in the hole and the body.
  • the adhe- sive can be provided in the gap, so that the adhesive extends between the material in the hole and the body.
  • the adhesive can fill the gap in a radial direction and at least partially in an axial direction.
  • the screw can be screwed into the device after setting of the adhesive.
  • the material can be fiberglass, such as a fiberglass material coated with a gelcoat, such as used for boats and boat parts.
  • the method can comprise the step of arranging the hole through said gelcoat.
  • the hole can be provided with a countersink and the device can be inserted so as to form a gap between a head of the device and the countersink.
  • the gap between the head of the device and the composite material in the countersink can be filled with adhesive.
  • the external thread and/or an axially extending outer surface of the head can be provided with adhesive. Hence, a considerable surface for the adhesive is provided so as to obtain a further reinforced fastening of the device.
  • the method can further comprise the step of cutting the composite ma- terial in the hole by means of the external thread of the device.
  • the material in the hole can be cut by means of the external thread of the device having a sharp or pointed thread profile.
  • the external thread can have a relatively low pitch of thread to reduce the risk of damage to the material in the hole while obtaining a relatively large engagement surface between the device and the material.
  • the method can further comprise the step of bringing less than half the depth of the external thread of the device to engage the composite material in the hole. Hence, a considerable gap is provided, which results in a substantial amount of adhesive. This has proven to provide a strong and durable fastening between the device and the material.
  • the present invention also relates to a device for fastening an object in a fiber-reinforced composite material, comprising a body having an external thread for engaging the composite material in a hole therein, characterised in that the body is provided with an axial bore having an internal thread for a screw, so that an external thread of the screw can engage the internal thread of the device for fastening of the screw to the device, the body is arranged to form a gap for an adhesive between the body and the composite material in the hole, and the external thread of the device is arranged with a depth of thread so as to only partially engage the composite material in the hole.
  • FIG. 1 is a schematic view of a device for fastening an object in a fiber- reinforced composite material according to one embodiment
  • Fig. 2 is a schematic section view along line ll-ll in Fig. 1 ,
  • Fig. 3 is a schematic view of a portion of the device according to Fig. 2, showing the thread profile
  • Fig. 4 is a schematic section view of the device according to Fig. 2, wherein the device is fastened to a material. DESCRIPTION OF EXAMPLES
  • the material is a fiberglass material, such as an epoxy based fiberglass provided with a gelcoat or similar as used for construction of boats and boat parts.
  • the device 10 comprises a body 1 1 provided with an external thread 12, so that the device 10 can be screwed into the material or a hole in the material while the external thread 12 engages the material for fastening the device 10 therein.
  • the device 10 comprises a head 13.
  • the device 10 comprises an axial bore 14 having an internal thread 15, wherein the device 10 is formed as a screw insert for receiving a screw in the axial bore 14, so that an external thread of the screw can engage the internal thread 15 of the device 10 for fastening of the screw to the device 10.
  • the screw is not illustrated in the drawings.
  • the device 10 is, for example, made of metal, such as stainless steel, or any other suitable metal.
  • the axial bore 14 extends in a direction perpendicular to or substantially perpendicular to the depth of the external thread 12.
  • the axial bore 14 is formed with a tool engaging portion 16 for engagement with a tool for screwing the device 10 into a hole in the material.
  • the tool engaging portion 16 is arranged at one end of the device 10.
  • the tool engaging portion 16 is arranged through the head 13 of the device 10.
  • the tool engaging portion 16 is arranged as a hexagon for receiving a hexagonal wrench.
  • the tool engaging portion 16 is formed as a rectangle or any suitable shape for cooperation with a corresponding tool.
  • the axial bore 14 continues beyond the tool engaging portion 16 further into the device 10 in the axial direction to form a screw receiving portion 17.
  • the screw receiving portion 17 comprises the internal thread 15.
  • the screw receiving portion 17 is arranged with smaller diameter than the tool receiving portion 16.
  • the diameter A of the tool receiving portion 16 is 2-20 mm, 3-15 mm, 4-10 mm or about 5-6 mm.
  • the axial bore 14 ends with the screw receiving portion 17, wherein the axial bore 14 is formed with a bottom 18.
  • the device 10 is water-proof, so that water cannot enter the axial bore 14 through the bottom 18 or through the body 1 1 .
  • the axial bore 14 is not a through bore, wherein the device 10 is provided with a single opening in one end of the axial bore 14 and the bottom 18 in the opposite second end of the axial bore 14.
  • the axial bore 14 is a through bore, wherein the device 19 is provided with two openings to the axial bore 14.
  • the head 13 is provided with a larger diameter
  • the diameter B of a radially extending top surface 19 of the head 13 is 5-25 mm, 10-15 mm or about 12 mm.
  • the head 13 is conical, wherein an external and axially extending surface 20 of the head 13 is bevelled an angle a.
  • the angle a of the bevelled surface 20 is about 20-70°, 30-60°, 40-50° or 45°.
  • the body 1 1 is substantially cylindrical or conical cylindrical, wherein the body 1 1 is arranged with a larger diameter at the head 13 and the opening into the axial bore 14 than at the bottom 18.
  • the body 1 1 is tapered an angle ⁇ about 2-20°, 3-10°, 4-8° or about 5-7°.
  • the total length C of the device 10 is 5-
  • the radius D of the device 10 at the bottom 18 is, for example, about 2-15 mm, 3-5 mm or 3.45 mm.
  • the tool engaging portion 16 is, for example, arranged with a depth E in the axial direction of about 2-10 mm, 3-6 mm or 4-5 mm.
  • the screw receiving portion 17 of the axial bore 14 is, for example, arranged with a depth F, i.e. substantially the distance between the tool receiving portion 16 and the bottom 18 or the axial length of the internal thread 15, in the axial direction of about 5-40 mm or about 10-20 mm. According to one embodiment example, the depth F of the screw receiving portion 17, or the length of the internal thread 15, is 9.5 mm.
  • the external thread 12 of the device 10 is illustrated more in detail.
  • the external thread 12 is a cutting thread for engaging the material around a hole therein, so that the external thread 14 cuts into the material.
  • the external thread 12 is not a forming thread.
  • the external thread 14 is arranged with a thread profile Y of 10-30°, 15-20°, 17-18° or about 17.5°.
  • the external thread 14 is, for ex- ample, arranged with a thread pitch G of about 0.5-3 mm or 1 -2 mm.
  • the external thread 14 is arranged with a depth of thread H of about 0.5-5 mm, 1 -3 mm, 1 .5-2 mm or about 1 .6 mm.
  • the device 10 is fastened to the material 21 , wherein a screw can be screwed into the device 10 to fasten an object to the material 21 .
  • the material 21 comprises a fiber-reinforced composite material 21 a, such as fiberglass, coated with a conventional gelcoat 21 b.
  • a hole 22 is drilled in the material 21 .
  • the hole 22 is drilled in previously untouched material.
  • the hole 22 is drilled in the position of a previously damaged or not damaged screw hole for a conventional screw.
  • the hole 22 is arranged larger than the diameter of the body 1 1 of the device 10, so that a gap 23 is formed between the body 1 1 and the material 21 in the hole 22 when the device 10 is arranged therein.
  • the hole 22 is countersunk forming a countersink 24 having a bevelled surface around the hole 22.
  • An adhesive is applied to the external surface of the device 10 and/or to the material surface in the hole 22.
  • the adhesive is applied to the external thread 12 of the device 10 and optionally also to the bevelled surface 20 of the head 13.
  • the adhesive is a two-component adhesive, such as a two-component epoxy adhesive.
  • the device 10 is positioned in the hole 22 and a tool for screwing the device 10 into the hole 22 is engaged with the tool engaging portion 16 of the axial bore 14, wherein the device 10 is screwed into the hole 22.
  • the device 10 is screwed into the hole 22 leaving a gap 25 also between the bevelled surface 20 of the head 13 and the countersink 24.
  • the gap 23 between the body 1 1 and the material around the hole 22 and the gap 25 between the countersink 24 and the bevelled surface 20 of the head 13 is filled with adhesive 26.
  • the body 1 1 is arranged to form the gap 23 for the adhesive 26 between the body 1 1 and the composite material 1 1 in the hole 22 and the head 13 is arranged to form the gap 25 for the adhesive 26 between countersink 24 and the bevelled surface 20 of the head 13.
  • the external thread 14 of the device 10 is arranged with a depth of thread H so as to only partially engage the material 21 in the hole 22.
  • the body 1 1 , the hole 22 and the external thread 14 is arranged so that less than half the depth of thread H is engaged with the material 21 when the device 10 is mounted and wherein more than half the depth of thread H form the gap 23 for the adhesive 26.
  • the gap 23 is about 0.5-3 mm or about 1 -2 mm, which distance is illustrated in Fig. 4 by means of the letter I.
  • a screw having an external thread corresponding to the internal thread 15 of the device 10 is inserted into the axial bore 14 to fasten an object to the material 21 , which is not illustrated in the drawings.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Connection Of Plates (AREA)

Abstract

L'invention concerne une méthode de fixation d'un objet dans un matériau composite renforcé de fibres (21) comprenant les étapes suivantes : créer un trou (22) dans le matériau (21) permettant de recevoir un dispositif (10) comportant un corps (11), un filetage extérieur (12) s'étendant à partir dudit corps (11) et un alésage axial (14) avec un filetage intérieur (15), le diamètre du trou (22) étant plus grand que le diamètre du corps (11) afin de former un interstice (23) entre le matériau (21) dans le trou (22) et le corps (11) lorsque le dispositif (10) est inséré dans le trou (22), appliquer un adhésif (26) sur le filetage extérieur (12) du dispositif (10) et/ou sur le matériau (21) dans le trou (22), visser le dispositif (10) dans le trou (22) de façon que le filetage extérieur (12) du dispositif (10) s'engage dans le matériau (21) et que l'adhésif (26) remplisse l'interstice (23) entre le matériau (21) dans le trou (22) et le corps (11), visser une vis ayant un filetage extérieur dans l'alésage (14) de façon que le filetage extérieur de la vis s'engage dans le filetage intérieur (15) du dispositif (10) afin de fixer la vis, et engager la vis avec l'objet à fixer afin de fixer l'objet au matériau (21). L'invention concerne aussi un dispositif de fixation d'un objet dans un matériau composite renforcé de fibres.
PCT/EP2011/056710 2011-04-28 2011-04-28 Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres Ceased WO2012146283A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/056710 WO2012146283A1 (fr) 2011-04-28 2011-04-28 Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/056710 WO2012146283A1 (fr) 2011-04-28 2011-04-28 Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres

Publications (1)

Publication Number Publication Date
WO2012146283A1 true WO2012146283A1 (fr) 2012-11-01

Family

ID=44626737

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/056710 Ceased WO2012146283A1 (fr) 2011-04-28 2011-04-28 Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres

Country Status (1)

Country Link
WO (1) WO2012146283A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017054943A1 (fr) * 2015-09-28 2017-04-06 Bayerische Motoren Werke Aktiengesellschaft Procédé pour fabriquer un élément composite renforcé de fibres avec insert de vissage intégré
CN109752903A (zh) * 2018-12-29 2019-05-14 中国科学院长春光学精密机械与物理研究所 用于遥感相机的桁架结构及其组装方法
WO2019096510A1 (fr) * 2017-11-15 2019-05-23 Siemens Mobility GmbH Procédé de production d'un élément sandwich et élément sandwich
WO2019207551A1 (fr) 2018-04-27 2019-10-31 Sabic Global Technologies B.V. Inserts et ses procédés de fabrication
WO2020070638A1 (fr) * 2018-10-04 2020-04-09 F.Lli Mauri S.R.L. Douille à vissage rapide

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362281A (en) * 1966-02-25 1968-01-09 Fastener Products Inc Insert bushing
EP0358896A2 (fr) * 1988-09-15 1990-03-21 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Carter d'huile matière plastique
EP1048858A2 (fr) * 1999-04-26 2000-11-02 WILO GmbH Insert fileté pour matière plastique et méthode pour l'insérer dans la matière plastique
US20020094255A1 (en) * 2001-01-12 2002-07-18 Ken Neuhengen High profile thread forming screw
DE202007004876U1 (de) * 2006-10-19 2007-06-06 Hirdes, Rüdiger, Dr. med. dent. Gewindeeinsatz, Gewindeeinsatzsystem und System zur Befestigung einer Halterung für eine Öse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362281A (en) * 1966-02-25 1968-01-09 Fastener Products Inc Insert bushing
EP0358896A2 (fr) * 1988-09-15 1990-03-21 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Carter d'huile matière plastique
EP1048858A2 (fr) * 1999-04-26 2000-11-02 WILO GmbH Insert fileté pour matière plastique et méthode pour l'insérer dans la matière plastique
US20020094255A1 (en) * 2001-01-12 2002-07-18 Ken Neuhengen High profile thread forming screw
DE202007004876U1 (de) * 2006-10-19 2007-06-06 Hirdes, Rüdiger, Dr. med. dent. Gewindeeinsatz, Gewindeeinsatzsystem und System zur Befestigung einer Halterung für eine Öse

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017054943A1 (fr) * 2015-09-28 2017-04-06 Bayerische Motoren Werke Aktiengesellschaft Procédé pour fabriquer un élément composite renforcé de fibres avec insert de vissage intégré
CN107708978A (zh) * 2015-09-28 2018-02-16 宝马股份公司 用于制造集成有旋入式嵌件的纤维复合构件的方法
WO2019096510A1 (fr) * 2017-11-15 2019-05-23 Siemens Mobility GmbH Procédé de production d'un élément sandwich et élément sandwich
WO2019207551A1 (fr) 2018-04-27 2019-10-31 Sabic Global Technologies B.V. Inserts et ses procédés de fabrication
WO2020070638A1 (fr) * 2018-10-04 2020-04-09 F.Lli Mauri S.R.L. Douille à vissage rapide
CN109752903A (zh) * 2018-12-29 2019-05-14 中国科学院长春光学精密机械与物理研究所 用于遥感相机的桁架结构及其组装方法
CN109752903B (zh) * 2018-12-29 2020-10-27 中国科学院长春光学精密机械与物理研究所 用于遥感相机的桁架结构及其组装方法

Similar Documents

Publication Publication Date Title
US8591159B2 (en) Screw having underside pockets
US10400813B2 (en) Hybrid fastener
US9003662B2 (en) Insert and method for anchoring in a cored panel
US8382414B2 (en) Threaded fastener and related method of installation
WO2012146283A1 (fr) Méthode et dispositif de fixation d'un objet dans un matériau composite renforcé de fibres
US5499896A (en) Combined drill screw with reamer
CN102187105A (zh) 带嵌入式凸缘的多角形驱动部件
BRPI0708277A2 (pt) prendedor cego de parafuso mecanicamente travado
CA2633015A1 (fr) Ensemble de fixation
US9631660B2 (en) Self-drilling bolt and nut assembly
US8105004B2 (en) Hybrid composite-metal male fasteners
GB2491805A (en) Fastening Assembly
US20100329813A1 (en) Self-Tapping and Self-Aligning Insert to Replace Damaged Threads
US20040156696A1 (en) Fastener for fiberglass and other composite structures
US9016995B1 (en) Self-countersinking fastener
US20100329816A1 (en) Self-Tapping Insert and Method of Utilizing the Same to Replace Damaged Threads for Hydraulic and Pneumatic Applications
EP0706435B1 (fr) Outillage de reparation de fissures
JP2005290844A (ja) まくら木、まくら木の製造方法及びまくら木の補修方法
US9943913B2 (en) Fastener removal aid devices
US11879487B1 (en) Self-tapping fastener
DE102016124210B4 (de) System zum lösbaren Verbinden mittels einer Schlagschraube
US20130187025A1 (en) Cavity forming plug for concrete
CA2977567C (fr) Element de fixation et procede
WO2012025341A1 (fr) Vis
US20170304967A1 (en) Thread repair insert

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11723286

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11723286

Country of ref document: EP

Kind code of ref document: A1