Abstract: A drill head for use in drilling bores in mines and tunnels has a bit and at least one suction opening (5) for removing drillings and having a crushing profile.

Abstract: A self-drilling rock anchor includes an anchor tube (2), a drill head (6) provided at the first end (5), an outer thread (8) provided at least in a region of the second, free end (7) of the anchor tube and an adapter (11) releasably connectable with the anchor tube (2) and having an inner thread (17) for engaging the outer thread (8) of the anchor tube (2), a screw stop (14), and a quick-intervention element (15) connectable with a rotatable chuck of a drilling tool the rock anchor is driven-in with.

Abstract: An anchor (1) comprising an anchor tube (2) and an inner tube (3) arranged in the anchor tube (2) for receiving a dispensable chemical mass (4). The anchor tube (2) has a first end (5) with a drilling head (6) and a second trailing end (7), at which a drilling machine can be coupled for rotary driving of the anchor (1). The anchor (1) further has a centering assembly with a first centering element (11) and a second centering element (21), which hold the inner tube (3) both radially and axially aligned in the anchor tube (2) by means of radial stop surfaces (17, 18) and axial stop surfaces (16, 26).

Abstract: A fastening element, which is used in particular in mines and/or tunnel construction, includes an anchoring tube (2), a squeezable-out, one-or multicomponent chemical mass contained in a foil bag (5;25) arranged in the anchoring tube (2;2) between spaced from each other, first stop (7,27) and second stop (9), and at least one pressure application element (14) arranged between the first stop (7,27) and/or the second stop (9) and a respective axial end region (11,12;31) of the foil bag (5;25) for applying pressure to the foil bag (5;25) in a shelf condition of the fastening element (1;21)

Abstract: An attachment element (1;51), includes a boring head (5), a hollow cylindrical receiving body (2; 53) having, at its end (4) facing in a setting direction (S) of the attachment element (1; 51), a recess for receiving the boring head (5) and at its opposite end (6), an engagement element (7), the attachment element further having at least one outlet opening (10.1; 10.2) through which a mortar mass located in the receiving body (2; 53) is squeezed out under a pressure applied by a piston (27), a channel section (29) extending between the mortar mass and the at least one outlet opening (10.1; 10.2), and an inner tube (21; 52) arranged in the receiving body (2; 53) at a predetermined distance from an inner wall of the receiving body (2; 53) for forming at least one suction channel (22; 42.1; 42.2) and in which the mortar mass and the channel section (29) are arranged.

Abstract: A method is described for fastening anchoring means, especially anchor rods, reinforcing iron, etc. in solid substrates by introducing a curable mortar composition and the anchoring means into a borehole provided in the solid substrate and curing the mortar composition, the curing of the mortar composition being initiated or brought about by introducing microwave energy over the anchoring means into the borehole. Furthermore, a device is described for carrying out this method, the device having an adapter unit (1), which can be connected over a coaxial cable or a waveguide (2) with the microwave generator, and a collet chuck (3), for frictionally fixing the adapter unit to the anchoring means (4) and for passing microwave energy into the mortar composition (7) present in the borehole (5) of the solid substrate (6), and a shielding (8), surrounding the collet chuck (3).

Abstract: A drill head for use in drilling bores in mines and tunnels has a bit and at least one suction opening (5) for removing drillings and having a crushing profile.

Abstract: An anchor (1) comprising an anchor tube (2) and an inner tube (3) arranged in the anchor tube (2) for receiving a dispensable chemical mass (4). The anchor tube (2) has a first end (5) with a drilling head (6) and a second trailing end (7), at which a drilling machine can be coupled for rotary driving of the anchor (1). The anchor (1) further has a centering assembly with a first centering element (11) and a second centering element (21), which hold the inner tube (3) both radially and axially aligned in the anchor tube (2) by means of radial stop surfaces (17, 18) and axial stop surfaces (16, 26).

Abstract: A self-drilling rock anchor includes an anchor tube (2), a drill head (6) provided at the first end (5), an outer thread (8) provided at least in a region of the second, free end (7) of the anchor tube and an adapter (11) releasably connectable with the anchor tube (2) and having an inner thread (17) for engaging the outer thread (8) of the anchor tube (2), a screw stop (14), and a quick-intervention element (15) connectable with a rotatable chuck of a drilling tool the rock anchor is driven-in with.

Abstract: An attachment element (1;51), includes a boring head (5), a hollow cylindrical receiving body (2; 53) having, at its end (4) facing in a setting direction (S) of the attachment element (1; 51), a recess for receiving the boring head (5) and at its opposite end (6), an engagement element (7), the attachment element further having at least one outlet opening (10.1; 10.2) through which a mortar mass located in the receiving body (2; 53) is squeezed out under a pressure applied by a piston (27), a channel section (29) extending between the mortar mass and the at least one outlet opening (10.1; 10.2), and an inner tube (21; 52) arranged in the receiving body (2; 53) at a predetermined distance from an inner wall of the receiving body (2; 53) for forming at least one suction channel (22; 42.1; 42.2) and in which the mortar mass and the channel section (29) are arranged.

Abstract: A substantially cylindrical washer having two arch-shaped channels 7, on a face on the bore hole side of the washer, wherein said channels connect an opening 2 with a through passage 3. The opening 2 is configured for the passage of an anchor rod and the through passage 3 is configured for filling a mortar mass into the bore hole. The channels 7 open relative to the bore hole and include a substantially semi-circular cross-section to assure the high tensile strength of the washer.

Abstract: A wall lead-in for at least one feeder line (10) and including an element formed of an expandable material (11) and provided in an intermediate annular space between a through-opening (7) formed in a wall (8) and the at least one feeder line (10), and a sleeve-shaped form member having an outer diameter corresponding to a diameter of the through-opening (7), designed for surrounding the feeder line (10) and arrangeable coaxially therewith, and formed of a form element (1) made of a perforated strip material and having a predetermined length.

Abstract: A drilling head including a base body (1), a bit (2) securable in a recess (10) formed in the base body (1) at the end of the base body (1) and facing in a drilling direction (B), and guide elements for guiding the base body and the bit relative to each other in a direction transverse to the drilling direction.

Abstract: A tubular anchor including a tubular member (1) having, at its one end, a crown-shaped drilling head (2) and, at its opposite end, a load application element a substantially cylindrical hollow element (7) filled with a mortar mass (4), located inside the tubular member (1), and having, at its end facing in the direction opposite to the setting direction, an opening (11) enabling flow of the mortar mass therethrough, and at least one longitudinal channel (12) communicating the opening (11) with an outlet opening (5) provided in the region of the drilling head (2).

Abstract: A tubular anchor includes a tubular member (1, 21) with a drilling head (2, 22) at one of its end, a load application element (3) extending along a portion of the tubular member opposite the one end, opening (5, 23) provided in a region of the drilling head. The tubular anchor also includes at least one, substantially cylindrical, hollow element (7, 24, 25) for receiving a mortar mass (4, 37, 38) and closed, at its opposite ends, with two displaceable pistons (8, 9; 31, 32, 33, 39), respectively, with one of the pistons being received in a piston-receiving region of the at least one mortar-mass receiving element and facing in a setting direction (S), (6, 35) and at least one through-opening (11, 34) spaced from a free end of the piston-receiving region (6, 35) by a distance (a, b) corresponding at least to a length (l) of the piston (8, 32) received therein.

Abstract: A substantially cylindrical washer having two arch-shaped channels 7, on a face on the bore hole side of the washer, wherein said channels connect an opening 2 with a through passage 3. The opening 2 is configured for the passage of an anchor rod and the through passage 3 is configured for filling a mortar mass into the bore hole. The channels 7 open relative to the bore hole and include a substantially semi-circular cross-section to assure the high tensile strength of the washer.

Abstract: A tubular anchor to be inserted into a bore formed in a constructional structure and including a hollow anchor body (1), and a trapezoidal thread-shaped profile (2) provided on at least a portion of an outer surface of the anchor body (1) and having a crest region (3) and a root region (4) both extending parallel to a longitudinal axis of the anchor body (1), with the at least flanks of a trapezoidal cross-section of the profile (2) remote from an end of the anchor body (1) facing in a setting direction being inclined with respect to the longitudinal axis of the anchor body (1) at an angle (&agr;) from 10° to 45°.

Abstract: 1. A tubular anchor including a tubular member (1, 21) having a drilling head (2, 22) at one end at one end thereof, load application means (3) at another opposite end thereof, and at least one outlet opening (5, 23) provided in a region of the drilling head, and at least one, substantially cylindrical, hollow element (7,24, 25) for receiving a mortar mass (4, 37, 38) and closed, at its opposite ends, with two pistons (8, 9; 31, 32, 33, 39), respectively, displaceable along the tubular member (1) with the at least one receiving element (7, 24, 25) having, at its end facing in a setting direction (S), a piston-receiving region (6, 35) and having at least one through-opening (11, 34) spaced from a free end of the piston-receiving region (6, 35) by a distance (a, b) corresponding at least to a length (1) of the piston (8, 32) received therein and measured in a longitudinal direction of the tubular member.

Abstract: A tubular anchor including a tubular member (1) having, at its one end, a crown-shaped drilling head (2) and, at its opposite end, a load application element a substantially cylindrical hollow element (7) filled with a mortar mass (4), located inside the tubular member (1), and having, at its end facing in the direction opposite to the setting direction, an opening (11) enabling flow of the mortar mass therethrough, and at least one longitudinal channel (12) communicating the opening (11) with an outlet opening (5) provided in the region of the drilling head (2).

Abstract: An anchor rod to be received in a bore filled with mortar mass including a connection region (2, 22, 32) having a plurality of axially arranged one after another, conical enlargements (4, 24, 34) a diameter of which increases in a setting direction and which are provided with circumferential sections (5, 25, 35) radially spaced from a longitudinal axis of the anchor rod (1, 21, 31) by a greatest distance, having a radius (r) smaller by from about 0.1 mm to about 1.5 mm then a half of a nominal diameter of the anchoring region receiving bore, and extending, respectively, in a circumferential direction over an angle of up to 300°.