An anchoring element that provides anchorage in an object, and is compressible in the direction of a compression axis under local enlargement of a distance between a peripheral anchoring element surface and the compression axis. The anchoring element has a coupling-in face which serves for coupling
An anchoring element that provides anchorage in an object, and is compressible in the direction of a compression axis under local enlargement of a distance between a peripheral anchoring element surface and the compression axis. The anchoring element has a coupling-in face which serves for coupling the mechanical vibrations into the anchoring element, which coupling-in face is not parallel to the compression axis. The anchoring element further includes a thermoplastic material which in areas of the peripheral surface enlargement forms at least a part of the surface of the anchoring element.
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1. An anchoring element suitable for being anchored in an object with the aid of mechanical vibrations, comprising: a core piece, the core piece comprising a shaft portion and a distal broadening portion, the distal broadening portion having a proximally-facing coupling-out face,a mantle piece, the
1. An anchoring element suitable for being anchored in an object with the aid of mechanical vibrations, comprising: a core piece, the core piece comprising a shaft portion and a distal broadening portion, the distal broadening portion having a proximally-facing coupling-out face,a mantle piece, the mantle piece comprising a thermoplastic material liquefiable by mechanical energy, wherein: the mantle piece surrounds the shaft portion at least partially,the mantle piece forms at least a part of a lateral face of the anchoring element,the mantle piece has a distal coupling-in face, proximally of the coupling-out face, andthe mantle piece is formed so that the coupling-out face is capable of being pressed against the coupling-in face,wherein the core piece is of a material that is not liquefiable or liquefiable at substantially higher temperatures compared to the thermoplastic material,wherein the shaft portion of the core piece reaches from proximally of the mantle piece at least to the distal broadening portion,wherein the shaft portion is equipped for being coupled to a source of mechanical vibrations, whereby the core piece is capable of serving as a sonotrode in an anchoring process in which the core piece is pulled against the mantle piece, and thereby the coupling-out face is pressed against the coupling-in face, while mechanical vibrations are coupled into the core piece until at least a portion of the thermoplastic material of the mantle pieced is liquefied from a solid to a liquid state and pressed, in the liquid state, into structures of the object adjacent the lateral face to form, after re-solidification, a positive-fit connection with the object, whereby the core piece is anchored in the object after being de-coupled from the source of mechanical vibrations. 2. The anchoring element according to claim 1, wherein the coupling-in face is essentially parallel to the coupling-out face. 3. The anchoring element according to claim 1, wherein the broadening portion has a cross-section that is rotationally asymmetric with respect to a shaft axis of the shaft portion. 4. The anchoring element according to claim 1, wherein the mantle piece is capable of being compressed along a compression axis not parallel to the coupling-in face when a compression force is applied to the coupling-in face, wherein the mantle piece is shaped to be expanded so that a distance between a peripheral anchoring surface of the mantle piece and the compression axis is locally enlarged when a compressing force is coupled into the mantle piece via the coupling-in face while the thermoplastic material is in a solid state. 5. The anchoring element according to claim 1, wherein the distal broadening portion is shaped to be a flange extending radially from the shaft portion. 6. The anchoring element according to claim 5, wherein the distal broadening portion is disk-like and circular. 7. The anchoring element according to claim 5, wherein the distal broadening portion extends radially from the shaft portion at a distal end of the shaft portion. 8. The anchoring element according to claim 1, wherein a proximal end of the shaft portion is threaded. 9. The anchoring element according to claim 1, wherein the distal broadening portion comprises reaming structures capable of drilling a hole in the object. 10. The anchoring element according to claim 1, wherein the core piece is metallic. 11. The anchoring element according to claim 1, wherein the core piece comprises retaining structures capable of being interpenetrated by liquefied material of the mantle piece, whereby the core piece is equipped for being anchored in the mantle piece after re-solidification of the thermoplastic material. 12. An assembly for providing anchorage in an object, the assembly comprising the anchoring element according to claim 1 and further comprising a source of mechanical vibrations equipped to be coupled to a proximal portion of the shaft portion. 13. The assembly according to claim 12 and further comprising a counter element shaped to be held against a proximal end of the mantle piece while the core piece is pulled. 14. The assembly according to claim 13 and further comprising a mechanism to apply a force between the core piece and the counter element to compress the mantle piece between the core piece and the counter element while mechanical vibrations are coupled into the core piece. 15. The assembly according to claim 14, wherein the source of mechanical vibration comprises a housing and wherein the mechanism comprises a spring capable of being tensioned to press the counter element and the housing into opposite directions. 16. The assembly according to claim 13, wherein the counter element is plate-like. 17. The assembly according to claim 12, wherein the source of mechanical vibration comprises an ultrasonic transducer.
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이 특허에 인용된 특허 (10)
Nelson Alfred Dwayne (Stillwater MN) Goken Garold L. (Birchwood MN), Adhesively bonded rail joint.
Aeschlimann, Marcel; Mock, Elmar; Torriani, Laurent; Koester, Heinz, Process for anchoring connecting elements in a material with pores or cavities and connecting elements therefor.
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