Abstract: A quick mounting nut (2) movable, at least partially, without being rotated, axially to a threaded bolt (1), with a springing wire clip (4) being located in a nut housing (5) with a continuous coaxial opening (6), with the wire clip (4) at least partially engaging in a bolt thread (3) and having two legs (8, 8′) which spring relative to one another, with the opening (6) having an inner cone (7) which narrows radially from an axial neutral position of the wire clip (4) and with the wire clip (4) being movable axially to a limited extent and contacting at least partially inside the inner cone (7) in its locking position.

Abstract: An attachment device including an anchoring unit having at least two gripping members (9, 22, 37) and a receiving member (10, 26, 35) with openings (14, 28, 36) for guiding the gripping members (9, 22, 37), a mounting rail (2, 20) with a mounting opening (3) limited on its opposite sides by longitudinal walls (4), with the longitudinal walls (4) being provided on its adjacent to each other sides with retaining projections (5, 21, 40) that are engaged, in a locking position of the device, at least partially by corresponding gripping members (9, 22, 37) in a directions transverse to a longitudinal direction of the mounting rail (2); and a bolt (7, 33) for connecting an attachable object to the anchoring unit (1).

Abstract: A connection element for a bolt including a member for receiving the bolt (2) and including a bore (5) having a tapering region (7) adjoining a bore cylindrical receiving region (4) and tapering in a direction opposite a bolt insertion in direction (A); and a locking member supported in the bore (5) for forcelockingly engaging the bolt (2) and formed as a radially expandable annular member having an inner diameter (w), which is, at least partially, smaller than an outer diameter (d2) of the bolt (2), and an axial length corresponding to an axial length of the cylindrical receiving region (4).

Abstract: An attachment assembly formed of an anchor bolt (1) and an expansion wedge (2) with the anchor bolt having an outside surface (4) at its leading end in the setting direction and widening in a wedge-like manner. The expansion wedge (2) can be displaced axially along the wedge-like outside surface (4) for effecting expansion of the attachment assembly. At its trailing end (6), the anchor bolt (1) has a flange-like engagement part (5) for applying a load to a receiving material into which the attachment assembly is expanded. The engagement part (5) has a throughbore (3) through which the expansion wedge (2) extends and is secured in a preassembled state. The expansion wedge (2) has a trailing end section (14) extending rearwardly from the engagement part (5) in the preassembled state so that in the expanded state the expansion wedge is held in a press fit in the throughbore (3).

Abstract: A self-tapping screw has a cutting thread formed by two separate threads (3, 4). An imaginary envelope (5) defines a annular space (5) laterally enclosing the screw shank and has a section (5a) tapering inwardly along an inwardly tapering leading end section (1a) of the shank (1). The inwardly tapering section of the annular enclosing space an envelope forms an angle (B) considerably larger than the angle (A) formed by the tapering leading end section (1a) of the shank. The leading ends (3a, 4a) of the separate threads (3, 4) are located diametrically opposite one another for uniform distribution of the forces developed when the screw penetrates into a hard receiving material, such as concrete, masonry, gas concrete and the like.

Abstract: An expansion dowel includes an axially extending sleeve with a leading end and a trailing end. The sleeve is conically shaped for at least an axially extending portion from the leading end with the conically shaped portion diverging outwardly toward the trailing end. Axially extending projections protrude outwardly from the outer surface of the conically shaped portion of the sleeve and have at least one axially extending flank with a planar surface inclined relative to the axis of the sleeve. The at least one inclined flank forms a working surface which acts against any pulling out force on the sleeve and ensures high anchoring values.

Abstract: An anchor member assembly is made up of an anchor bolt and an expansion wedge. The assembly can be anchored in a borehole in a receiving material by inserting the assembly and then displacing the expansion wedge relative to a wedge surface on the anchor bolt. At its trailing end, the anchor bolt has an axially extending outwardly flaring head section forming at least a part of a conical surface. The head section can be driven by hammer blows into a wooden member. Initially, the anchor bolt and expansion wedge are in detachable engagement until the head section is driven into the wooden member. Subsequently, as the expansion wedge is axially displaced relative to the anchor bolt, the engagement between them is released and the anchor member assembly is secured in the receiving material.

Abstract: An expansion dowel assembly includes an axially elongated anchor bolt and a pair of serially arranged expansion elements or shells into which the anchor bolt is drawn. The anchor bolt has axially extending conically shaped expansion members spaced apart in the axial direction and each is arranged to be drawn into a different one of the expansion elements. The expansion member closer to the leading end of the anchor bolt has a larger cone angle than the other expansion member. The expansion elements are interconnected by a web so that the expansion elements are axially displaceable relative to one another. When the anchor bolt with its expansion members is drawn into the expansion elements, initially the trailing expansion element is widened or expanded. Subsequently, after a predetermined axial movement of the leading expansion element toward the trailing expansion element, the widening of the leading expansion element is commenced.

Abstract: An expansion dowel assembly is made up of an axially extending dowel body and an expansion member in contacting engagement with the dowel body. The expansion member extends in the axial direction of the dowel body and is formed by a main part and an extension part projecting axially from the main part in the insertion direction of the assembly into a borehole. The cross-sectional area of the extension part transverse to the axial direction is smaller than the adjacent corresponding cross-sectional area of the main part. The extension part is shaped relative to the main part to increase the contact area of the expansion member with the dowel body and to prevent the development of excessively high surface pressures at the front end of the expansion member.

Abstract: An expansion dowel includes an axially elongated expansion sleeve, an expansion body and a threaded bolt secured to the expansion body. The expansion sleeve has a leading end arranged to be inserted first into a borehole in a receiving material and a trailing end. The expansion sleeve is slotted in the axial direction from the leading end so that the sleeve expands radially as the threaded bolt draws the expansion body into the leading end of the sleeve. Further, the sleeve has an axially deformable region between the leading and trailing ends. A shoulder extends radially outwardly from the sleeve adjacent the trailing end. A disc is held on the outside of the sleeve spaced axially from the shoulder toward the leading end of the sleeve. During the placement of the dowel, as the expansion body is drawn into the leading end of the sleeve, a minimum anchoring value is reached. After reaching the minimum anchoring value, the sleeve is axially deformed.

Abstract: An expansion dowel is made up of an expansion sleeve and an expansion body with a radially outer conically shaped surface. To expand the sleeve, the expansion body is pulled into the leading end of the sleeve. The leading end of the sleeve is connected to the expansion body by two elongated webs. A bridge section on the end of each web forms the connection to the expansion body and the bridge section is breakable under expansion conditions. The expansion dowel can be formed from a single blank of sheet metal in a forming operation.

Abstract: An expansion dowel includes an axially extending expansion sleeve and an expansion member rolled from a section of sheet metal. The sleeve has a leading end and a trailing end and the inside surface of the sleeve is threaded for an axially extending section from the trailing end. The thread is formed before the sheet metal is rolled. To assure there is no misalignment of the thread along the butt joint, tangs and recesses are formed along the edges of the butt joint so that the edges interengage one another when the sheet metal section is rolled. By interengaging the butt joint edges, the sleeve does not expand circumferentially when a bolt is threaded into the trailing end of the sleeve.

Abstract: An expansion dowel assembly is made up of an axially elongated generally cylindrically shaped dowel body and at least one wedge-shaped expansion member formed monolithically with the dowel body. The dowel body has a first or leading end which is inserted first into a borehole within which the dowel body is to be anchored and an opposite second end. A severable web connects the expansion member to the first end of the dowel body. Before insertion into a borehole, the expansion member projects outwardly from the exterior surface of the dowel body. When the expansion dowel assembly is inserted into a borehole, the web is broken and the expansion member, now separated from the dowel body, is displaced away from the first end within a wedge-shaped recess in the exterior surface of the dowel body.

Abstract: A metal expansion dowel is made up of an axially elongated cylindrically shaped expansion sleeve and an expansion element formed monolithically with the sleeve. The expansion sleeve has a leading end and a trailing end. The sleeve has an opening with the opposite edge surfaces extending in the axial direction converging toward the leading end. The expansion element is located in the opening and is secured to the sleeve by a separable web. The expansion element is wedge-shaped and narrows in the leading end direction. An inwardly projecting stop is formed in the expansion element. When an axial force is directed toward the leading end against the stop, the web is separated from the sleeve and the expansion element is displaced axially toward the leading end of the sleeve moving along the opposite edge surfaces of the opening and widening the sleeve.

Abstract: An expansion anchor assembly for use in a borehole formed in a receiving material has a leading end and a trailing end relative to the insertion direction of the assembly into the borehole. The expansion anchor assembly includes a tie rod with an expansion cone at its leading end, an expansion sleeve through which the tie rod extends and a cone sleeve positioned around the expansion cone and between the expansion cone and the leading end of the expansion sleeve. The radially outer surfaces of the expansion cone and the cone sleeve each have a different cone angle. Due to the different once angle, when the tie rod is drawn into the expansion sleeve toward the trailing end of the assembly, the part with the smaller cone angle moves in the same direction into the expansion sleeve until it contacts a stop. Subsequently on continued inward movement of the tie rod, both the expansion cone and the cone sleeve are drawn into the leading end of the expansion sleeve and effect an increased expanding action.

Abstract: An expansion dowel includes an axially elongated sleeve-shaped dowel body slit in the axial direction from the leading end. A spiral-shaped expansion body is located in the dowel body in the axially extending region of the slit. By axially displacing the expansion body toward the leading end of the dowel body it widens radially outwardly and in turn expands the axially slit region of the dowel body providing the required anchoring effect.

Abstract: An expansion anchor assembly includes an expansion sleeve formed at least in part by axially extending extension sections, an expansion body and an anchor rod attached to the expansion body. By pulling the expansion body into the end of the sleeve formed by the expansion sections, the sections are spread radially outwardly. An axially extending part of the outside surface of the expansion body is formed by a plurality of outwardly tapering axially extending and circumferentially adjacent convex surfaces having an arc shape in the direction transverse to the axial direction of the expansion body. The radius of curvature of each arc-shaped convex surface is the same over its axial length. Each expansion section of the sleeve has an axially extending radially inner concave surface corresponding to one of the arc-shaped convex surfaces on the expansion body.

Abstract: An expansion dowel arranged to be anchored in a borehole includes an axially extending dowel member having a leading end and a trailing end and being partly sleeve-shaped extending from the trailing end. A wedge-shaped recess is formed inwardly from the outside surface of the dowel with the depth of the recess decreasing toward the leading end of the dowel member. A complementary shaped wedge member is located in the recess and is displaceable therein toward the leading end of the dowel member. An annular groove formed in the dowel member from the leading end toward the trailing end. The depth of the annular groove increases for at least a part of the axial length from the leading end of the dowel member. An expansion member is seated in the annular groove and extends around the dowel member. The expansion member has a stop shoulder located in the path of the wedge member as it is displaced toward the leading end.

Abstract: An expansion dowel assembly includes an axially elongated sleeve having a leading end and a trailing end, an axially extending spreading member located within the sleeve adjacent its leading end, and a threaded bolt extending into the trailing end and toward the leading end of the sleeve. The threaded bolt is axially movable within the sleeve between a first position where the dowel assembly can be inserted into the borehole and a second position where the bolt is driven further into the sleeve into expanding contact with the spreading member for radially expanding the spreading member and the sleeve. An abutment is provided for the leading end of the dowel assembly to prevent displacement of the spreading member out of the sleeve when the bolt is driven from the first position toward the second position.

Abstract: An expansion dowel assembly includes an anchor bolt and an expansion element made up of at least two expansion element parts offset from one another in the axial and circumferential direction when mounted on the anchor bolt. A web interconnects the adjacent expansion element parts. Recesses are formed in the circumferential surface of the anchor bolt for receiving the expansion element parts. Another recess connects the recesses for the expansion elements parts and is arranged to receive the web interconnecting these parts. The expansion element parts encircle the anchor bolt by more than half of its circumference so that holders are not needed for securing the expansion element on the anchor bolt.