Abstract: A hand-held power tool is disclosed. The power tool has a linear motor with a rotor, an exciter piston that is coupled mechanically to the rotor, and a bearing device with a rotor mounting to support the longitudinal movement of the rotor and an exciter piston mounting to support the exciter piston. The rotor mounting and the exciter piston mounting form a three-point mounting, which is the sole bearing for the rotor and the exciter piston.

Abstract: In an installation channel to be embedded into a curable construction material, e.g. concrete, having a support profile and preferably an attachment for attaching at least one add-on part to the installation channel, so that the outside of the support profile has a direct connection to the curable construction material at an embedding area, a potential fault block should be large so that large forces can be absorbed by the installation channel. A compressible insert is fastened to the outside of the support profile at the embedding area, so that part of the outside of the support profile is not in direct contact with the curable construction material at the embedding area.

Abstract: A handheld power tool is disclosed. The handheld power tool has a linear motor with a rotor. The tool also has a bearing device which has a bearing position for bearing support of the rotor. The bearing position has at least one guide strip which engages in a recess provided in the rotor.

Abstract: A hand-held power tool is disclosed. The power tool has a linear motor with a rotor, an exciter piston that is coupled mechanically to the rotor, and a bearing device with a rotor mounting to support the longitudinal movement of the rotor and an exciter piston mounting to support the exciter piston. The rotor mounting and the exciter piston mounting form a three-point mounting, which is the sole bearing for the rotor and the exciter piston.

Abstract: In an installation channel to be embedded into a curable construction material, e.g. concrete, having a support profile and preferably an attachment for attaching at least one add-on part to the installation channel, so that the outside of the support profile has a direct connection to the curable construction material at an embedding area, a potential fault block should be large so that large forces can be absorbed by the installation channel. A compressible insert is fastened to the outside of the support profile at the embedding area, so that part of the outside of the support profile is not in direct contact with the curable construction material at the embedding area.

Abstract: A concrete screw is disclosed. The concrete screw has a shaft section, a thread section, which is arranged on the front end of the concrete screw and is provided with at least one expansion slot, and an expansion element, which is allocated to the expansion slot such that the expansion element expands the expansion slot during screw-in. A method and a tangential impact screwdriver for driving in such a concrete screw are also disclosed.

Abstract: A hand-held power tool (1) includes a linear motor (2) having a rotor (3) which is movable along a percussion axis (A) in an axially limited manner between two reversal points (W) and which can be driven by the striking piston (5) of the power tool with the intermediary of an air spring (4), sensors designed for determining the actual state of the rotor (3) and connected to a computer (9) connected via power electronics (33) to at least one field coil (10) of the linear motor (2), with the rotor (3) being displaced against a contact element (11a, 11b) at least at one reversal point (W) and being pressed against the contact element electromagnetically; and a control process for the hand-held power tool.

Abstract: A method is described for anchoring a fastening element (11) in a mineral component (1), in which a bore hole (2) is provided in the component (1) using a drill bit having a nominal drill bit diameter, and a fastening element (11) is then screwed into the provided bore hole (2). The fastening element (11) has a shank (12) which is provided with rotary engagement device (16) for a setting tool, and has a core diameter (K) and cutting edges (21) on a first end region. The fastening element has a self-tapping thread (17) in which the difference between the outer diameter of the thread (17) and the core diameter (K) of the shank (12) corresponds to 0.05 to 0.7 times the pitch of the thread (17). A drill bit is used which has a nominal drill bit diameter corresponding to 0.95 to 1.10 times the core diameter (K) of the shank (12). Also described is a fastening element (11) for anchoring in a mineral component (1).

Abstract: An anchoring element for being mounted on a shaft (52; 62; 72; 92) of a fastening element (51; 61; 71; 91) has a through-opening for the shaft (52; 62; 72; 92) and a strip extending around the through-opening (12; 32; 82) over an angular region of more than 360°.

Abstract: A flat ring-shaped anchoring element (11; 31; 71) for mounting on a shaft (52; 62) of a fastening element (51; 61) provided with an outer profile (53), includes a through-opening (12; 32) for the shaft (52; 62) and at least one compensation recess (13; 33) located radially outwardly of the through-opening (12; 32) and opening thereto.

Abstract: An anchoring element for being mounted on a shaft (52) of a fastening element (51) includes a sleeve-shaped base body (13; 33; 63; 73; 83) forming a through-opening (12; 32; 62; 72; 82) for the shaft (52), and anchoring sections (15; 35; 85) projecting outwardly from an outer side of the base body (13) for anchoring on a wall of a borehole (42). Each of the anchoring sections (15; 35; 85) has at least four sides, with one of the sides forming a connection side (89) for connecting a respective anchoring section (15; 35, 85) with the base body (13; 33; 63; 73; 83) and with at least a side located opposite the connection side (89) forming a cleaning side (90) of the respective anchoring section (15; 35; 85). The cleaning side (90) has at least one cleaning edge for cleaning the wall of the borehole (42) during driving of the anchoring element (11; 31; 61; 71; 81) in the borehole (42).

Abstract: A fastening assembly (11) for fastening a mounting part (6) to a constructional component (7) and including a fastening element (12) having a shaft (14) extending along a longitudinal axis (13), a holding portion (15) projecting radially at a first end of the shaft, and an anchoring portion (16) provided at the opposite, second, free end of the shaft for anchoring in the constructional component (7), and a shear force transmission element (21) provided on the fastening element (12) between the holding portion (15) and the anchoring portion (16) in the set state of the fastening assembly in the through-opening (8) of the mounting part (6), with the shear force transmission element (21) having, in a mounted state thereof, an axial length (L) that is smaller than its initial axial length and that is reduced from its initial axial length (H) by the holding portion (15) of the fastening element (12).

Abstract: A hand-held power tool (1) includes a linear motor (2) having a rotor (3) which is movable along a percussion axis (A) in an axially limited manner between two reversal points (W) and which can be driven by the striking piston (5) of the power tool with the intermediary of an air spring (4), sensors designed for determining the actual state of the rotor (3) and connected to a computer (9) connected via power electronics (33) to at least one field coil (10) of the linear motor (2), with the rotor (3) being displaced against a contact element (11a, 11b) at least at one reversal point (W) and being pressed against the contact element electromagnetically; and a control process for the hand-held power tool.

Abstract: A clamping device connects two, axially harmonically oscillating components which oscillate, as a result of their respective plane surfaces impacting each other with a frequency ? in the form of a stationary longitudinal wave with a distance A between two nodes K. The clamping device includes an axially extending springy gripping yoke having two clamping elements. The two clamping elements are located at opposite ends of the gripping yoke. The two clamping elements are spaced apart from each other by a distance corresponding to the distance A between the two nodes K of the longitudinal wave.

Abstract: A chemically anchorable fastening element (6), includes a holding section (16; 56) for contacting a wall of a borehole (6) and provided with a thread-tapping outer thread (19) and with a load application element (18; 58), a connection section (26; 66) adjoining the holding section (16; 56) and having a smaller radial dimensions than the holding section (16; 56), and an anchoring section (36; 76) adjoining the connection section (26; 66) and likewise having smaller radial dimensions than the holding section (16; 56).

Abstract: An expansion anchor has an anchor member (21; 51) that has a longitudinal bore (24), a load application element (25, 55) and an expansion section (22; 52) located between first and second sections (26, 27; 56, 57) of the anchor member (21) and a cross-section of which widens from the first section (26; 56) toward the second section (27; 57; and an expansion sleeve (13; 43) having an axial longitudinal bore (14) with which it is guided over the first section (26; 56) of the anchor member (21; 41) and an expansion region (15) located adjacent to the expansion section (22; 52) of the anchor member (21; 41), with at least one of the anchor member (21; 41) and the expansion sleeve (13; 43) having at least one through-opening (18; 58) for a hardenable mass (31) and which opens into one of the axial bore (54) of the anchor member or the axial bore (14) of the expansion sleeve.

Abstract: A clamping device for connecting two, axially harmonically oscillating components which oscillate, as a result of their respective plane surfaces (3a, 3b) impacting each other, with a frequency [omega] in the form of a stationary longitudinal wave (9) with a distance (A) between two nodes (K), includes an axially extending springy gripping yoke (4) having two clamping elements (5a, 5b) provided at its opposite ends and connectable by a spring (6), the two clamping elements (5a, 5b) being spaced from each other by a distance corresponding to the distance (A) between the two nodes (K) of the longitudinal wave (9), being oriented toward respective opposite ends, and forming respective compressible contact surfaces (7).

Abstract: A quick-connector for terminal fastening of a penetrating rebar (7) to a perpendicularly oriented concrete dowel (2), the connector comprising a wire clip (1) having a deflected segment of wire of the length (L) at least partially made of resilient-elastic metal, wherein the wire clip (1) includes, with respect to a primary turning arc (3), arms (5, 5′) that are mirror-symmetrical to an angle-bisecting plane (4), wherein each arm (5, 5′) forms a deflected secondary turning arc (6, 6′) transverse to the primary turning arc (3) and a clippable hook (8, 8′) that rests force-lockingly into a radial external surface zone (9), of a terminal radial expansion (1), of the concrete dowel (2).

Abstract: The invention relates to a film holding apparatus for the holding of an intermittently transmitted motion picture film. The film holding apparatus has a film track for the guiding of the motion picture film and a registration device which can be moved from a release position into an engagement position. In the engagement position, the registration device engages into the transport plane of the motion picture film to fix a motion picture film guided in the film track in an exact position. At least one alternative position can be selected alternatively to a reference position for the engagement of the registration device into the film transport plane.

Abstract: A coupling (1) transmits ultrasound energy along an independent axis (A) between a tool receptacle (2) and a tool (3) having two contact means (4a, 4b) directed opposite each other, which can be axially biased using a pre-stressing, biasing means (5), wherein at least one contact means (4a, 4b) has at least one axially directed, linear or pointform contact tip (6).