Abstract: A setting tool for anchor rods of attachment anchors, which have a rear end section (P) having a polygonal cross-section, the setting tool including a housing (2) provided with an insertion end receivable in a chuck of a percussion rotary drill and a rod receptacle (5) provided at an end of the housing opposite, in an axial direction (A), to the insertion end (5), the rod receptacle (5) having an axially extending inner surface (6) provided with at least two ribs (7) projecting therefrom and extending in the axial direction (A), with the ribs (7) defining an inscribed cylinder (Z) having a diameter (x) larger by from about 0.05 mm to about 0.5 mm than a diameter (y) of a circle (K) inscribed in a polygonal cross-section of the rear and section (P) of the anchor rod.

Abstract: An anchor rod for an attachment anchor including a trailing region (1) provided with a load application element (2), and an anchoring region (4) submergeable in a hardenable inorganic and/or organic mortar mass and having a mixing section formed of a head portion (5) provided at its free end (6) with a cutter (7) extending substantially transverse to the axis (A) of the anchor rod, a transporting section (10) adjoining the mixing section, and a compression section (13) adjoining the transporting section (10), with the head portion (5) having a region (53), the outer diameter (c) of which is larger than the largest diameter (d) of the transporting and compression sections (10,13) of the anchoring region (4), and provided with a mortar mass transporting arrangement (9).

Abstract: A member (1) for insertion into a borehole (9) in a receiving material (10) has an axially extending generally cylindrical hollow body (2) closed at its leading end (4) and open at its trailing end (5) and into which a mortar mass and anchor member can be inserted. The hollow body (2) has a sieve-like mesh wall. At least one circumferentially extending strip (8) of a compressible elastic open pore material is secured on the outside surface of the hollow body (2) for cleaning the surface of the borehole while the member is inserted into the borehole.

Abstract: In a method of fastening an attachment member (1) in a prefabricated borehole (2) in a wooden component (B), the inside surface of the borehole is provided with a profiled surface (2a) by a threadformer (4) which compacts the inside surface of the borehole (2). The borehole (2) is filled with a hardenable mass before the attachment member is inserted into the borehole.

Abstract: The retention value of a screw previously inserted into a wooden railroad tie is increased by an axially extending sleeve ( 20 ) having an external thread ( 24 ) and an internal thread (25). The thread revolutions of the internal thread (25) are offset axially by half (h) the thread pitch (H) of the external thread (24). Due to this offset of the threads, the screw is positioned in the sleeve so that its threads are located between the external thread revolutions affording a new retention, while the external thread (24) seats within the thread previously formed in the wooden railroad tie by the screw.

Abstract: Attachment elements to be fixed to panel-shaped structural components by a hardenable material include an axially elongated dowel sleeve (1) forming a passageway extending from a second end toward a first end. An axially extending annular part (2) encircles the dowel sleeve. A bag-like member (3) is secured to the annular part and to the dowel sleeve adjacent the first ends thereof. The bag-like member is inserted through a borehole in the structural component from an outer side thereof. The bag-like member can be filled with a hardenable material providing a gripping action with an inner side of the structural component. The bag-like member, when filled with the hardenable material, has a first side facing the inner side of the structural component and an oppositely facing second side with openings in the first side being larger than the openings in the second side.

Abstract: An anchor member to be fixed in a borehole by a permanently hardenable mass is formed as a sleeve-like member with the outside surface deformed inwardly at axially and circumferentially spaced areas so that the inside surface is deformed into a multi-sided cross-section. The inside surface can be four-sided with the inwardly deformed areas increasing the anchoring effect and preventing turning of the member when a fastening element is threaded into its trailing end. The sleeve-like member is closed at its leading end to avoid the hardenable mass from flowing into the member.

Abstract: A dowel assembly for use as an anchor in a structural material, such as a light and hollow structural material, includes an axially extending sleeve formed of expanded metal for receiving a hardenable mass and an anchor member. The sleeve is closed at its leading end and is open at its trailing end. The leading end is closed by folds formed in the expanded metal and the trailing end has an outwardly projecting flange. Such a sleeve fabricated from expanded metal is inherently stiff and can be produced economically.

Abstract: A method of securing an anchor rod in a borehole at an underwater location without the use of expanding force includes a first step of partially filling the borehole with a flowable hardenable bonding mass. Next, a cartridge containing a hardenable bonding mass is placed in the borehole and a part of the flowable bonding mass is displaced from the borehole. Since the cartridge substantially fills the borehole, the flowable bonding mass flows between the borehole surface and the cartridge. Finally, an anchor rod is driven into the borehole breaking up or destroying the cartridge, so that the two bonding masses mix, harden and bond the anchor within the borehole.

Abstract: An installation tool for placing anchor elements includes an axially extending member and a ball with a thread on the member for engagement with the anchor element to be installed. The ball is captured in a receiving space in the installation tool and serves as a stop for limiting the threaded engagement of the tool with the anchor element. The ball has only a punctiform contact with the element, accordingly, the frictional engagement between the ball and the element developed while an anchor element is being screwed in is very small, so that the installation tool can be unscrewed easily from the anchor element after the element is installed.

Abstract: An anchor member is formed of an axially extending core member enclosed from one end toward the other by an electrically non-conductive plastics material jacket. The anchor member can be secured in a borehole in a receiving material by a hardenable mass. The jacket at the one or leading end of the core member has a tip located on an extension of the core member axis, so that the tip abuts the center of the base of the borehole. With the centering action afforded by the tip, damage to the jacket is prevented as the anchor member is inserted into the borehole.

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: A screen sleeve for use in combination with a hardenable mass for securing an anchoring element, inserted into the sleeve, in a receiving material where the sleeve is formed of an axially elongated, woven wire mesh, cylindrically shaped tubular member closed at one end and open at the other. The tubular member has a flange at its open end. Adjacent the flange, one or more outwardly projecting protrusions are formed from the wire mesh defining the tubular member.

Abstract: An axially elongated expansion sleeve is formed from an extruded cylindrically shaped blank with a blind hole in one end. An axially extending part of the blank from the other end is deformed into a U-shaped section of uniform thickness. The U-shaped section is upset so that it increases in thickness toward the other end. The upset U-shaped section is shaped to provide it with a cylindrically shaped outside surface with the inside base of the section sloping toward the axis of the sleeve in the direction toward the other end.

Abstract: A dowel for insertion into a borehole in a structural unit includes a dowel body and a spreading member. The dowel body is axially elongated and has a cylindrically shaped outside surface with a bore extending axially through the body. The body is formed of a sintered dry powdered metal made up primarily of iron and having a weight in the range of 5 to 7 g/cm.sup.3. Phosphorus in the range of 0.1 to 1% can be added to the dry powdered material to increase its cohesion. Further, the sintered material can be reinforced with fibers. An axially extending portion of the bore is conically shaped and the spreading member is similarly conically shaped for radially expanding the dowel body within the borehole.

Abstract: A manually operable device is provided for dispensing measured amounts of a mastic-like or paste-like multi-component material. The components are supplied in separate containers and each container has an axially displaceable ejection piston. The pistons are displaced by piston rods and each piston rod can be gripped by a clamping jaw and the jaw is displaced via a manually operated lever and a stirrup. A support bearing member affords lateral support for the piston rods and the clamping jaws are pivotally mounted on the bearing member. The drive for the piston rods acts through the clamping jaw and the support bearing member so that each rod is displaced axially and does not need to be connected to the other. Due to a symmetrical arrangement of the forces acting on the support bearing member, the forces cancel one another out.

Abstract: An expansion dowel assembly is formed of an axially extending dowel body and an expansion member. The dowel body has a support surface inclined relative to the axis of the dowel body along which the expansion member can be displaced for anchoring the dowel assembly in an opening such as a borehole. At least a portion of the support surface is in the form of a groove extending in the axial direction of the dowel body and the bottom of the groove is inclined so that the expansion member is forced radially outwardly away from the axis of the dowel body as it is displaced through the groove.

Abstract: In a dispensing device for filling boreholes with a single or multi-component adhesive, filler, sealer or primer, the material is conveyed from storage containers holding the individual components through a supply pipe and an outlet nozzle which dispenses the material directly into the borehole. By manually operating a handle lever, material is displaced out of the storage container into the supply pipe. Further, an actuating unit operated by the handle lever is connected to the outlet nozzle for telescoping it relative to the supply pipe whereby material is displaced out of the supply pipe through the outlet nozzle into the borehole.

Abstract: In a device for the melting and measured discharge of a thermoplastic adhesive, a sealing sleeve conveys the solid thermoplastic adhesive into the inlet end of a melting chamber. The sealing sleeve is formed of a temperature resistant, poor heat conductive material with good sliding properties, such as polytetrafluoroethylene. Further, the sealing sleeve is provided with slots extending in the axial direction of the sleeve from the end more remote from the melting chamber toward the melting chamber.

Abstract: In a device for the melting and measured discharge of a thermoplastic adhesive material, a melting chamber is enclosed by a heating coil. The adhesive material in solid rod form is supplied into the melting chamber through a sealing sleeve formed of a material such as polytetrafluoroethylene (TEFLON). A heating element is mounted on the bearing sleeve adjacent the melting chamber to heat up the sleeve and the material within it to a desired temperature. A switch or other member is connected to the heating element on the sleeve for discontinuing its supply of heat to the sleeve when the desired temperature is reached. The part of the sealing sleeve on the opposite side of the heating element from the melting chamber can be provided with some structure to dissipate or block the flow of heat through the sealing sleeve away from the melting chamber.