Abstract: A fastener assembly may have a spring, a bolt, a stud, an end-piece, and a shear pin. In one embodiment of the invention, the bolt has (a) a shaft engaged with a first end of the spring, (b) a head, and (c) an internally-facing surface defining a passageway that extends through the bolt head and the bolt shaft. The stud has (a) a first end and (b) a second end, and the first end of the stud is engaged with a second end of the spring. The stud may include an internally-facing surface defining a hole that extends from the first end toward the second end of the stud. The end-piece, which may be a nut or an anchor, is engaged with the second end of the stud. Part of the shear pin resides in the passageway of the bolt, and a different part of the shear pin engages the stud. Also, the shear pin may include a slot on an end of the shear pin that may be used to remove a portion of the shear pin from the stud after the shear pin breaks.

Abstract: The invention relates to a bolt-like ultrasound anchor (1) which at the forward end changes by means of an annular step (3) by way of a desired breaking point (6) integrally into a truncated-cone-shaped expander body (4) and which is provided with slots (5) arranged windmill-like on generating lines of the expander body (4). Together with the annular step (3), the slots (5) form the desired breaking point (6). As a result of the action of ultrasound, the expander body (4) is separated from the ultrasound anchor (1) at the desired breaking point (6) and the ultrasound anchor (1) is pushed onto the expander body (4) and in so doing expanded. In addition, as a result of the action of ultrasound, welding of the ultrasound anchor (1) to the expander body (4) and sintering in a drilled hole take place.

Abstract: An anchoring device for insertion in a hole provided in a structure such as a wall (hollow or solid) comprises proximal and distal sections. The proximal section includes a head defining an aperture for receiving a fastener, and the distal section includes a pair of expandable wings displaceable between collapsed and expanded positions. Each wing is biased towards its expanded position such that the wings can engage the structural material delimiting the hole or a distal surface of the structure. The distal section comprises, proximally of the wings, a variable-length flexible portion for allowing the wings to engage the distal surface of the structure for various structure thicknesses. The distal section comprises, distally of the wings, a tip section adapted to spread outwardly when engaged by the fastener. The proximal section comprises a pair of legs each having a toothed rack for engaging the structural material.

Abstract: The resin anchor comprises an apertured tubular envelope designed to be compressed by a traction element, characterized in that it includes, on the inside of the envelope, a resin component and a hardener component that are intended to be mixed together and to cure under the action of the compression of the envelope (1), in order to fasten the anchor, at least one of the two components being sacheted, the mix formed from the two components being expelled out of the envelope via its apertures, during its compression. The traction element may be a screw that cooperates with the end element of the bushing CD forming a nut. The anchor is fastened both mechanically and chemically, for either solid material or hollow material.

Abstract: The shaft is connected to the shaft attachment by a thread. A bore with an internal thread is incorporated in the shaft attachment and the shaft has a corresponding stem which can be introduced into the threaded bore and has an external thread. An axial stop is arranged on the shaft and on the shaft attachment. The internal and external threads have torque-transmitting flanks which are flat toward the axis and which can be connected to one another frictionally by radial pressure by mutual rotation of shaft and shaft attachment with interaction between the axial stops. Owing to the small angle between the load-bearing flanks and the axis, the radial pressure decisive for the torque transmission is correspondingly greater than in conventional threaded connections. As a result, the axial prestressing force between the two parts to be connected can be correspondingly reduced.

Abstract: The expanding sleeve (2) of the anchor is arranged around a threaded shank (9) engaged in a plug (3) for expanding the sleeve (2). The sleeve (2) comprises an axially compressible portion (16) which comprises means (24) that can be sheared and which are arranged so that after they have been sheared they allow the sleeve (2) to be shortened axially. The sleeve (2) consists of a cut-out sheet-metal blank rolled up on itself.

Abstract: A blind fastener assembly is disclosed, which is suitable for use in joint assemblies including advanced composite materials. The fastener assembly includes a pin, an expander, a sleeve, and an expandable washer, each of which have an initial diameter which permit them to pass through a hole in the workpiece. The washer is mounted about the pin shank between the sleeve and a tapered nose portion of the expander. The fastener assembly is inserted in a hole in the workpiece so that the expander head abuts the workpiece. Rotation of the pin causes the sleeve to force the washer to slide over the tapered nose portion of the expander causing it to expand and abut the blind side of the workpiece. In one embodiment of the invention the pin threadably engages the expander, and the head of the pin is positioned on the blind side of the workpiece. The washer is initially seated in a groove in the pin shank.

Abstract: Disclosed is a straddling dowel, of plastic, having a continuous screw insertion hole and several expansion segments that are formed by longitudinal slits in the dowel body and which extend from the circular head portion to the circular foot portion of the dowel. In the latter part, a female thread can be cut by the inserted screw, thereby rendering axial expansion of the dowel body posible. The expansion segments are formed by overlapping annular plates or discs which, on spreading or axial expansion in the form of an increase in diameter or spreading move relative to each other over the whole extent of the contacting surfaces of adjacent plates or discs, which contacting surfaces run obliquely or conically to the axis of the dowel.

Abstract: An expansion dowel consists of an axially extending dowel body with a spreading member at its leading end and an expansion member extending around the dowel body rearwardly of the spreading member. A helically arranged control cam surface is formed on the expansion member and faces toward the trailing end of the dowel body. A stop is formed on and extends outwardly from the dowel body and contacts the control cam surface. When the dowel body is turned around its axis relative to the expansion member, the stop rides on the control cam surface and causes the spreading member to expand the expansion member radially outwardly.