FR2784722A1 - Self tapping wood screw with milled head for cutting a countersunk hole in hard material to accommodate the head - Google Patents
Self tapping wood screw with milled head for cutting a countersunk hole in hard material to accommodate the head Download PDFInfo
- Publication number
- FR2784722A1 FR2784722A1 FR9813173A FR9813173A FR2784722A1 FR 2784722 A1 FR2784722 A1 FR 2784722A1 FR 9813173 A FR9813173 A FR 9813173A FR 9813173 A FR9813173 A FR 9813173A FR 2784722 A1 FR2784722 A1 FR 2784722A1
- Authority
- FR
- France
- Prior art keywords
- head
- thread
- screw
- screw according
- threaded part
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 13
- 239000002023 wood Substances 0.000 title claims description 5
- 238000010079 rubber tapping Methods 0.000 title 1
- 238000005553 drilling Methods 0.000 claims description 7
- 238000009933 burial Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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
- F16B25/0036—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
- 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
- F16B25/0078—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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Wood Science & Technology (AREA)
- Connection Of Plates (AREA)
- Golf Clubs (AREA)
Abstract
Description
La présente invention a pour objet une à bois à tte fraisée auto-foreuse, à enfouissement total dans la pièce à visser. The subject of the present invention is a woodworking machine with a self-drilling countersunk head, with total burial in the part to be screwed.
On connaît de nombreuses variétés de vis, dont la plus commune est la vis à bois ou à aggloméré à tte fraisée. Many varieties of screws are known, the most common of which is the wood or chipboard screw with a countersunk head.
Généralement, la pose d'une telle vis nécessite, selon la dureté du matériau, de percer un avant-trou et de chanfreiner celui-ci afin de permettre 1'enfouissement de la tte de la vis. Generally, the installation of such a screw requires, depending on the hardness of the material, to drill a pilot hole and to chamfer it so as to allow the burial of the head of the screw.
Du fait de la généralisation de l'usage de l'outillage électrique portatif de vissage, les vis doivent comporter certaines caractéristiques comme par exemple une empreinte creuse de type pozidrive afin de centrer l'embout de vissage et d'empcher son échappement, et une pointe plus effilée facilitant l'amorce du vissage. Due to the generalization of the use of portable electric screwing tools, the screws must include certain characteristics such as for example a hollow imprint of the pozidrive type in order to center the screwing tip and prevent its exhaust, and a more tapered point facilitating the initiation of screwing.
Lors du vissage dans un matériau particulièrement tendre comme par exemple du bois de pin ou de sapin ou certains agglomérés, un chanfreinage préalable n'est pas nécessaire, la pression exercée à l'écrasement du matériau afin d'y loger la tte. When screwing in a particularly soft material such as for example pine or fir wood or certain agglomerates, a prior chamfering is not necessary, the pressure exerted on the crushing of the material in order to accommodate the head therein.
I1 demeure toutefois que pour certains matériaux relativement durs le chanfreinage est indispensable, de mme que le pré-perçage afin d'éviter par exemple l'éclatement du matériau. However, for certain relatively hard materials, chamfering is essential, as is pre-drilling in order to prevent the material from bursting, for example.
D'autre part, pour certaines dimensions de vis et/ou pour certains matériaux, un couple important est nécessaire, or les outils électriques de vissage ne sont pas tous de forte puissance. On the other hand, for certain screw dimensions and / or for certain materials, a significant torque is necessary, but the electric screwing tools are not all of high power.
D'autre part encore, lors du vissage dans un matériau relativement dur au moyen d'un outil non pourvu d'un limiteur de couple, il arrive que la vis se bloque et que sa tte se rompe. On the other hand, when screwing into a relatively hard material using a tool not provided with a torque limiter, it sometimes happens that the screw is blocked and that its head is broken.
Enfin, le profil du filet est généralement un triangle équilatéral dont l'angle au sommet est compris entre 50 et 60 , ce qui constitue un compromis entre la résistance à l'arrachement et la facilité d'enfoncement. En effet, si un angle plus petit offre une plus grande résistance à l'arrachement, il ne permet pas un enfoncement aisé, et inversement. Finally, the profile of the thread is generally an equilateral triangle whose angle at the top is between 50 and 60, which constitutes a compromise between the resistance to tearing and the ease of insertion. Indeed, if a smaller angle offers greater resistance to tearing, it does not allow easy insertion, and vice versa.
La présente invention vise à remédier à ces divers inconvénients en proposant une vis à bois à tte fraisée auto-foreuse à enfouissement total dans la pièceà visser, nécessitant moins de couple qu'une vis connue de dimensions équivalentes et offrant une meilleure résistance à l'arrachement, ne nécessitant qu'exceptionnellement un perçage et un chanfreinage préalables, autorisant ainsi un gain de temps de pose non négligeable. The present invention aims to remedy these various drawbacks by proposing a self-drilling countersunk head wood screw with total burial in the piece to be screwed, requiring less torque than a known screw of equivalent dimensions and offering better resistance to tearing, only exceptionally requiring prior drilling and chamfering, thus allowing a significant saving in installation time.
Une vis selon l'invention se caractérise essentiellement d'une part en ce qu'elle comporte des nervures régulièrement réparties sur la surface tronconique de sa tte, s'étendant chacune entre le bord supérieur et la base de celle-ci, légèrement inclinées dans le sens du filet, de section transversale sensiblement triangulaire et dont la face qui entre en contact avec le matériau lors du vissage est sensiblement perpendiculaire à ladite surface tronconique ; d'autre part en ce que le corps de la partie filetée comporte à la base du filet des stries longitudinales parallèles en saillie ; et d'autre part encore en ce que le profil du filet est un triangle dont l'angle au sommet est compris entre 35 et 45 . A screw according to the invention is essentially characterized on the one hand in that it comprises ribs regularly distributed over the frustoconical surface of its head, each extending between the upper edge and the base thereof, slightly inclined in the direction of the thread, of substantially triangular cross section and the face of which comes into contact with the material during screwing is substantially perpendicular to said frustoconical surface; on the other hand in that the body of the threaded part comprises at the base of the thread parallel protruding longitudinal grooves; and on the other hand also in that the profile of the thread is a triangle whose angle at the top is between 35 and 45.
Les nervures disposées sous la tte de la vis permettent d'enlever de la matière et de réaliser partiellement le chanfrein lors du vissage, tandis que les stries longitudinales permettent de réduire la surface de frottement, en sorte que le vissage nécessite un couple moins important. The ribs arranged under the head of the screw make it possible to remove material and to partially produce the chamfer during screwing, while the longitudinal ridges make it possible to reduce the friction surface, so that screwing requires less torque.
Le filet dont l'angle est compris entre 35 et 45 , de préférence 40 , procure une résistance à l'arrachement, l'inconvénient à l'enfoncement étant compensé par les stries longitudinales et leur effet. The thread, the angle of which is between 35 and 45, preferably 40, provides resistance to tearing, the drawback disadvantage being offset by the longitudinal ridges and their effect.
Selon une caractéristique additionnelle de la vis selon l'invention, une partie tronconique moins évasée que la tte est intercalée entre cette dernière et la tige. According to an additional characteristic of the screw according to the invention, a frustoconical part less flared than the head is interposed between the latter and the rod.
La partie tronconique intermédiaire renforce la liaison entre la tte et la tige, diminuant ainsi le risque de rupture, et permettant d'autre part la réalisation d'une empreinte creuse plus profonde. The intermediate frustoconical part strengthens the connection between the head and the rod, thereby reducing the risk of rupture, and on the other hand allowing the production of a deeper hollow imprint.
Selon une autre caractéristique additionnelle de la vis selon l'invention, les stries longitudinales sont disposées hélicoidalement, enroulées dans le sens du filet. According to another additional characteristic of the screw according to the invention, the longitudinal ridges are arranged helically, wound in the direction of the thread.
Selon une autre caractéristique additionnelle de la vis selon l'invention, la pointe de la partie filetée présente une entaille latérale coupante de forage. According to another additional characteristic of the screw according to the invention, the tip of the threaded part has a cutting side notch for drilling.
Selon une autre caractéristique additionnelle de la vis selon l'invention la pointe est très effilée, formant un angle compris entre 25 et 30. According to another additional characteristic of the screw according to the invention, the point is very tapered, forming an angle between 25 and 30.
Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif. The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.
Dans le dessin annexé :
-la figure 1 représente une vue en plan d'une vis selon l'invention.In the attached drawing:
FIG. 1 represents a plan view of a screw according to the invention.
-la figure 2 représente une vue en coupe de la mme vis selon l'axe XX'de la figure 1. FIG. 2 represents a sectional view of the same screw along the axis XX ′ of FIG. 1.
-la figure 3 représente une vue en coupe de la mme vis selon l'axe YY'de la figure 1. FIG. 3 represents a sectional view of the same screw along the axis YY 'of FIG. 1.
-la figure 4 représente une vue partielle en coupe longitudinale de la mame vis. FIG. 4 represents a partial view in longitudinal section of the same screw.
Si on se réfère à la figure 1, on peut voir qu'une vis selon l'invention comporte une partie filetée 1 et une tte fraisée 2, reliées entre elles par une partie intermédiaire tronconique 3. If we refer to FIG. 1, we can see that a screw according to the invention has a threaded part 1 and a countersunk head 2, connected to each other by a frustoconical intermediate part 3.
La partie intermédiaire tronconique 3 renforce la liaison et diminue les risques de rupture, elle permet en outre de réaliser une empreinte, non visible, plus profonde, assurant ainsi une meilleure répartition de l'effort de vissage sur l'embout de l'outil de vissage. The frustoconical intermediate portion 3 strengthens the connection and reduces the risk of breakage, it also makes it possible to produce a deeper, non-visible imprint, thus ensuring a better distribution of the screwing force on the tip of the tool. screwing.
Si on réfère également à la figure 2, on peut voir que la tte 2 comporte sur sa face tronconique 20 des nervures 21 régulièrement réparties, s'étendant entre le bord supérieur 22 et la base 23 de la tte 2, et légèrement inclinées dans le sens du filet 11, c'est-à-dire dans le sens du vissage. If we also refer to FIG. 2, we can see that the head 2 has on its frustoconical face 20 ribs 21 regularly distributed, extending between the upper edge 22 and the base 23 of the head 2, and slightly inclined in the direction of the thread 11, that is to say in the direction of screwing.
Les nervures 21 sont de section sensiblement triangulaire, la face 24 qui entre en contact avec la pièce à visser étant sensiblement perpendiculaire à la face tronconique 20, de manière à enlever de la matière lors du vissage et à créer un chanfrein. The ribs 21 are of substantially triangular section, the face 24 which comes into contact with the part to be screwed being substantially perpendicular to the frustoconical face 20, so as to remove material during screwing and to create a chamfer.
Si on se réfère également à la figure 3, on peut voir que le corps 10 de la partie filetée 1 comporte longitudinalement, à la base des filets 11, des stries 12. If reference is also made to FIG. 3, it can be seen that the body 10 of the threaded part 1 comprises longitudinally, at the base of the threads 11, ridges 12.
Les stries 12 permettent de réduire la surface de frottement du corps 10 contre la pièce à visser lors du vissage, ce qui améliore le couple de vissage. The ridges 12 make it possible to reduce the friction surface of the body 10 against the part to be screwed during screwing, which improves the screwing torque.
On notera que sur la figure 1, les stries 12 sont rectilignes, parallèles à l'axe du corps 10, alors qu'il est possible qu'elles soient hélicoïdales, enroulée dans le sens du filet 11 mais d'un pas plus grand que celuici. It will be noted that in FIG. 1, the ridges 12 are rectilinear, parallel to the axis of the body 10, while it is possible that they are helical, wound in the direction of the thread 11 but with a pitch greater than this one.
On peut voir également sur la figure 1 que la pointe 13 de la partie filetée 1 est très effilée, formant un angle au sommet compris entre 25 et 30 , afin de permettre une meilleure pénétration et d'amorcer le vissage avec précision. It can also be seen in FIG. 1 that the point 13 of the threaded part 1 is very tapered, forming an apex angle of between 25 and 30, in order to allow better penetration and to initiate the screwing with precision.
La pointe 13 comporte en outre une entaille coupante 14 permettant d'enlever et d'évacuer de la matière, évitant ainsi de fendre ou d'éclater celle-ci, sans nécessiter de réaliser un avant-trou. The tip 13 further comprises a cutting notch 14 making it possible to remove and evacuate material, thus avoiding splitting or bursting it, without the need to make a pilot hole.
Si on se réfère maintenant à la figure 4, on peut voir que le filet 10 est de profil triangulaire, dont l'angle A au sommet est de 40'. If we now refer to Figure 4, we can see that the thread 10 is of triangular profile, whose angle A at the top is 40 '.
Un tel filet 10 offre une très grande résistance à l'arrachement, et l'effort supplémentaire nécessaireà l'enfoncement de la vis est compensé l'effet que procurent les nervures 12, lequel effet est accru par la pointe 13 effilée et 1'entaille de coupe 14. Such a thread 10 offers a very high resistance to tearing, and the additional effort required to drive the screw is compensated for the effect provided by the ribs 12, which effect is increased by the tapered tip 13 and the notch. cutting 14.
Claims (6)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9813173A FR2784722A1 (en) | 1998-10-19 | 1998-10-19 | Self tapping wood screw with milled head for cutting a countersunk hole in hard material to accommodate the head |
| CN98126522A CN1251886A (en) | 1998-10-19 | 1998-12-01 | Sunk wood screw |
| KR1019980059368A KR20000028537A (en) | 1998-10-19 | 1998-12-28 | Screw having ribs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9813173A FR2784722A1 (en) | 1998-10-19 | 1998-10-19 | Self tapping wood screw with milled head for cutting a countersunk hole in hard material to accommodate the head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2784722A1 true FR2784722A1 (en) | 2000-04-21 |
Family
ID=9531803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9813173A Withdrawn FR2784722A1 (en) | 1998-10-19 | 1998-10-19 | Self tapping wood screw with milled head for cutting a countersunk hole in hard material to accommodate the head |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20000028537A (en) |
| CN (1) | CN1251886A (en) |
| FR (1) | FR2784722A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU733414B3 (en) * | 2001-01-17 | 2001-05-10 | Chun Chen Screw Co., Ltd. | Improvement in the structure of a screw |
| EP1182367A2 (en) * | 2000-08-26 | 2002-02-27 | Rathscheck Schiefer und Dach-Systeme KG | Screw for fastening panels and the like |
| EP1193407A1 (en) * | 2000-08-28 | 2002-04-03 | Berner GmbH | Distance screw |
| WO2020125890A1 (en) | 2018-12-19 | 2020-06-25 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
| US11879491B2 (en) | 2018-12-19 | 2024-01-23 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20313819U1 (en) * | 2003-09-05 | 2005-01-13 | A-Z Ausrüstung Und Zubehör Gmbh & Co. Kg | countersunk |
| US20110064540A1 (en) * | 2009-09-17 | 2011-03-17 | Mirco Walther | Screw having underside cutters and pockets |
| CN103047245A (en) * | 2012-12-21 | 2013-04-17 | 庆达科技股份有限公司 | Locking assembly with quick spin locking function |
| TWM466982U (en) * | 2013-05-30 | 2013-12-01 | Shuenn Chang Fa Entpr Co Ltd | Screw |
| CN103671424B (en) * | 2013-12-03 | 2017-01-25 | 贵阳永青仪电科技有限公司 | Stop countersunk head self-tapping screw with threaded hole |
| EP3064786A1 (en) * | 2015-03-02 | 2016-09-07 | HILTI Aktiengesellschaft | Fastening element and method |
| CN104948555B (en) * | 2015-06-16 | 2018-04-13 | 浙江天开实业有限公司 | A kind of six muscle annular knurl Screw with tail having groove of bilayer head plum blossom groove band |
| CN105736545A (en) * | 2016-05-12 | 2016-07-06 | 珠海格力电器股份有限公司 | Screw nail |
| TWI622710B (en) * | 2017-05-02 | 2018-05-01 | 徐敏豪 | Screw for a thin iron plate |
| CA3095780C (en) * | 2018-04-09 | 2021-09-14 | The Hillman Group, Inc. | Screw-type fastener for concrete and hurricane resistance applications |
| CN108523975B (en) * | 2018-05-04 | 2024-07-16 | 胡斯旺 | Medical screw based on organism osteogenesis function |
| KR200495597Y1 (en) | 2020-02-06 | 2022-07-06 | 주식회사 선경일볼트 | Diffuser screw piece |
-
1998
- 1998-10-19 FR FR9813173A patent/FR2784722A1/en not_active Withdrawn
- 1998-12-01 CN CN98126522A patent/CN1251886A/en active Pending
- 1998-12-28 KR KR1019980059368A patent/KR20000028537A/en not_active Application Discontinuation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1182367A2 (en) * | 2000-08-26 | 2002-02-27 | Rathscheck Schiefer und Dach-Systeme KG | Screw for fastening panels and the like |
| EP1182367A3 (en) * | 2000-08-26 | 2003-03-19 | Rathscheck Schiefer und Dach-Systeme KG | Screw for fastening panels and the like |
| EP1193407A1 (en) * | 2000-08-28 | 2002-04-03 | Berner GmbH | Distance screw |
| AU733414B3 (en) * | 2001-01-17 | 2001-05-10 | Chun Chen Screw Co., Ltd. | Improvement in the structure of a screw |
| WO2020125890A1 (en) | 2018-12-19 | 2020-06-25 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
| US11879491B2 (en) | 2018-12-19 | 2024-01-23 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000028537A (en) | 2000-05-25 |
| CN1251886A (en) | 2000-05-03 |
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