Abrégé

The present invention relates to a drive tool (10), a screw and a system for transmitting a drive torque. The drive tool (10) can be guided in a receiving recess of a connecting partner, in particular in a receiving recess of the screw, and transmit the drive torque during a rotation about a central axis (18). The drive tool (10) has radially outwardly projecting first projections (16) which are wedge-shaped in cross-section and which are suitable for transmitting the drive torque to the connecting partner. The drive tool (10) comprises a quasi-cylindrical section in which all of the surface lines in the region of the quasi-cylindrical section form an angle of less than 10° with the central axis (18), but the outer face is, at least in sections, of conical form such that the surface lines in the respective section are inclined by at least 1.5°, preferably by at least 2.5°, with respect to the central axis (18). Furthermore, the drive tool (10) comprises a tapering section in which the surface lines, in the region of the radially outer vertex sections of the first projections (16), have at least in sections an angle of at least 30°, preferably at least 40° and particularly preferably at least 44° with respect to the central axis.

Classes IPC  ?

• B25B 15/00 - Tournevis
• B25B 23/10 - Dispositions pour manipuler les vis ou écrous pour tenir ou présenter la vis ou l'écrou avant ou pendant sa rotation par des moyens mécaniques de prise
• F16B 23/00 - Têtes de boulons ou de vis de forme spéciale pour permettre leur rotation à l'aide d'un outil

Abrégé

The invention relates to a method for producing a screw (26) having a continuous thread (28) of variable thread pitch, wherein a blank (16) is rolled between two rolling dies (24), wherein a roller profile is implemented in each rolling die, comprising a group of curved, non-parallel recesses (34). The recesses (34) are implemented and arranged so that zero or as little as possible volume transport takes place in the axial direction during rolling, or a volume transport from an area of the blank at which a thread segment having greater thread pitch is to be implemented, into an area in which a thread segment having a smaller thread pitch is to be implemented.

Classes IPC  ?

• B21H 3/06 - Fabrication au moyen d'éléments profilés autres que des rouleaux, p. ex. au moyen de mâchoires se déplaçant longitudinalement ou décrivant des courbes l'une par rapport à l'autre

Abrégé

The invention relates to a method for producing a screw, wherein a blank (16) is rolled between two rolling dies (24). A roll profile is implemented in each rolling die (24), comprising a plurality of longitudinal recesses (34). The rolling die (24) comprises a first and a second end (30, 32), spaced apart in the rolling direction, wherein the blank (16) is displaced relative to the rolling die (24) from the first end (30) toward the second end (32) while rolling. The average pitch of the center lines of the recesses (34), defined as the quotient of the changes in positions of the center lines in the direction transverse or parallel to the rolling direction, is different in an area of the first end (30) of the rolling die (24) than the average pitch in an area of the second end (32) of the rolling die opposite the area of the first end—as seen in the rolling direction.

Classes IPC  ?

• B21H 3/06 - Fabrication au moyen d'éléments profilés autres que des rouleaux, p. ex. au moyen de mâchoires se déplaçant longitudinalement ou décrivant des courbes l'une par rapport à l'autre

Abrégé

A thread-forming screw for clamping two components is characterized in that the screw has two threaded sections (4, 5) with threads of different pitches, wherein the thread pitches of both threads adjoin each other in the joint.

Classes IPC  ?

• F16B 25/10 - Vis exécutant une fonction autre que celle de formation de filets, p. ex. vis-forets

Abrégé

The invention relates to a method for producing a threaded insert having an internal and external thread which have different thread pitches or the same thread pitch, wherein the threaded insert is wound from a profile strip which, on the one side thereof, is pre-shaped with the profile of the external thread, and on the other side thereof, is pre-shaped with the profile of the internal thread, and to a threaded insert which is generated by means of said method.

Classes IPC  ?

• F16B 37/12 - Écrous ou pièces similaires avec entrées de filetage avec surfaces d'entrée de filetage consistant en une insertion de ressorts hélicoïdaux, de disques ou de pièces analoguesÉcrous constitués par des morceaux indépendants de fil métallique enrouléGarnitures filetées intérieures pour trous

Abrégé

A screw anchor for fastening add-on parts in concrete or brickwork comprising a shaft (10), which encompasses a thread, is characterized in that the external thread is embodied at a spiral (15), which is embodied separately from the shaft (10) and in that the spiral is connected to the outer periphery of the shaft in a positive manner.

Classes IPC  ?

• F16B 35/00 - Boulons filetésBoulons d'ancrageGoujons filetésVisVis de pression

Abrégé

Method for reinforcing a component and/or for introducing force into a component using a screw or a threaded rod, wherein the screw or threaded rod has a thread with a variable thread lead, which thread creates an internal stress distribution, which is suitable to reduce at least one maximum in the bond stress occurring under loading of the component.

Classes IPC  ?

• F16B 39/30 - Blocage uniquement par tracé spécial du filetage
• F16B 33/02 - Tracé du filetageProfils de filetage particuliers
• F16B 25/00 - Vis formant des filets dans le matériau dans lequel elles sont vissées, p. ex. vis à bois, vis auto-taraudeuses

Abrégé

A thread-forming screw comprises a shank portion of a solid material and a thread portion which is joined to the shank portion and is wound from a profiled metal strip.

Classes IPC  ?

• F16B 25/10 - Vis exécutant une fonction autre que celle de formation de filets, p. ex. vis-forets

Abrégé

The invention relates to a method for producing a threaded insert having an internal and external thread which have different thread pitches or the same thread pitch, wherein the threaded insert is wound from a profile strip which, on the one side thereof, is pre-shaped with the profile of the external thread, and on the other side thereof, is pre-shaped with the profile of the internal thread, and to a threaded insert which is generated by means of said method.

Classes IPC  ?

• F16B 37/12 - Écrous ou pièces similaires avec entrées de filetage avec surfaces d'entrée de filetage consistant en une insertion de ressorts hélicoïdaux, de disques ou de pièces analoguesÉcrous constitués par des morceaux indépendants de fil métallique enrouléGarnitures filetées intérieures pour trous
• B21K 1/56 - Fabrication d'éléments de machines d'éléments filetés
• F16B 33/02 - Tracé du filetageProfils de filetage particuliers
• B21H 3/00 - Fabrication de corps hélicoïdaux ou de corps ayant certaines parties de forme hélicoïdale

Abrégé

The invention relates to a screw anchor for fastening mounted parts in concrete or brickwork, having a shaft (10) comprising a screw. Said screw anchor is characterized in that the outer thread is formed on a spiral (15) separated from the shaft (10) and in that the spiral is connected to the outer circumference of the shaft in a positively engaged fashion.

Classes IPC  ?

• F16B 37/12 - Écrous ou pièces similaires avec entrées de filetage avec surfaces d'entrée de filetage consistant en une insertion de ressorts hélicoïdaux, de disques ou de pièces analoguesÉcrous constitués par des morceaux indépendants de fil métallique enrouléGarnitures filetées intérieures pour trous
• F16B 13/00 - Chevilles ou autres dispositifs fixés à des parois ou autres emplacements par insertion dans des trous préparés à cet effet

Abrégé

The invention relates to a screw anchor for fastening devices in concrete or masonry, particularly for use in corroding surroundings, for example outside, with a shaft (1) provided at least partially with a thread. The screw anchor is characterized in that at least in the region of the mounting end thereof a sealed, corrosion resistant cover (9) preferably made of a corrosion resistant plastic with high permanent durability encloses it.

Classes IPC  ?

• F16B 25/00 - Vis formant des filets dans le matériau dans lequel elles sont vissées, p. ex. vis à bois, vis auto-taraudeuses
• F16B 33/00 - Caractéristiques communes aux boulons et aux écrous
• F16B 33/06 - Traitement de surface des parties où se trouve réalisé le filetage, p. ex. pour empêcher le grippage

Abrégé

The invention relates to a method for reinforcing a component and/or for introducing force into a component using a screw or threaded rod, wherein the screw or threaded rod has a thread with a variable thread pitch that produces a distribution of internal stress in the component that is suitable for reducing at least a maximum in the composite stress that occurs during loading of said component.

Classes IPC  ?

• F16B 33/02 - Tracé du filetageProfils de filetage particuliers

Abrégé

The invention relates to the head of a countersunk screw with a lower side which has at least one supporting surface (2), which forms part of a rotational surface about the screw axis (7) and can nestle against a correspondingly contoured countersunk surface (11) of an add-on part (10), and has at least one depression (6) which is delimited by a cutting edge (4) at its end which runs downwards, as seen in the screwing-in direction (e) of the countersunk screw. The invention is distinguished in that in front of the supporting surface (2), as seen in the screwing-in direction (e), there is an approach surface (3) which butts against said supporting surface, is inclined radially inwards and, at its upwardly running, free end, has the cutting edge (4) which, over its length, maintains a radial distance (a) from the rotational surface to the inside.

Classes IPC  ?

• F16B 35/06 - Têtes de forme particulière

Abrégé

The invention relates to a countersunk head screw comprising a cylindrical shaft (2) and an essentially conical countersunk head (4) comprising at least two edges (15) on the lower side. Said countersunk head screw is characterised in that the edges each mark an end of a partial surface (10) located on the lower side, each of the partial surfaces lying on a non-concave separate surface of revolution.

Classes IPC  ?

• F16B 35/06 - Têtes de forme particulière

Abrégé

The invention relates to a screw anchor for fixing wood components to concrete or masonry. Said anchor has a shaft (1) comprising a first threaded section (2) with a wood screw thread (6) for screwing into wood, and a second threaded section (3) with a concrete thread (7) for screwing into concrete, the pitch (P2) of the wood screw thread being equal to, or slightly smaller than, the pitch (P1) of the concrete thread (7).

Classes IPC  ?

• F16B 5/02 - Jonction de feuilles ou de plaques soit entre elles soit à des bandes ou barres parallèles à elles par organes de fixation utilisant un filetage
• F16B 25/00 - Vis formant des filets dans le matériau dans lequel elles sont vissées, p. ex. vis à bois, vis auto-taraudeuses

Abrégé

The invention relates to the head of a countersunk screw with a lower side which has at least one supporting surface (2), which forms part of a rotational surface about the screw axis (7) and can nestle against a correspondingly contoured countersunk surface (11) of an add-on part (10), and has at least one depression (6) which is delimited by a cutting edge (4) at its end which runs downwards, as seen in the screwing-in direction (e) of the countersunk screw. The invention is distinguished in that in front of the supporting surface (2), as seen in the screwing-in direction (e), there is an approach surface (3) which butts against said supporting surface, is inclined radially inwards and, at its upwardly running, free end, has the cutting edge (4) which, over its length, maintains a radial distance (a) from the rotational surface to the inside.

Classes IPC  ?

• F16B 35/06 - Têtes de forme particulière

Abrégé

The invention relates to a countersunk head screw comprising a cylindrical shaft (2) and an essentially conical countersunk head (4) comprising at least two edges (15) on the lower side. Said countersunk head screw is characterised in that the edges each mark an end of a partial surface (10) located on the lower side, each of the partial surfaces lying on a non-concave separate surface of revolution.

Classes IPC  ?

• F16B 35/06 - Têtes de forme particulière