Abstract: A power tool 1 including a bit socket 6 which is configured to hold a chiseling bit 7 so that the latter can move along an axis of movement 3. A magneto-pneumatic striking mechanism 2 includes a primary drive 22 that is arranged around the axis of movement 3 and that has a first magnet coil 46, a permanently and radially magnetizable ring magnet 42 and a second magnet coil 47 arranged consecutively in the striking direction 5. On the axis of movement 3, inside the magnet coils 46, 47, the striking mechanism 2 has a striker 4 and a striking block 13 arranged consecutively in the striking direction 5. An air cushion 23 acts upon the striker 4 in the striking direction 5.

Abstract: The invention relates to a fastening tool comprising a handheld housing with a piston element (1), which is received in the housing and which can be moved in a driven manner, for transmitting energy to a fixing element (3). The piston element (1) is guided in a cylinder (2) and can be accelerated towards the fixing element (3) by a drive force, and the piston element (1) can be held in a starting position by a magnetic force of a retaining element (5). The retaining element (5) has a first magnetically conductive stop (7) and a second magnetically conductive stop (8). The magnetic stops (7, 8) are connected by a magnetically conductive counter piece (9) arranged on a piston element when the piston element (1) is being held, and excitation magnet (6) is arranged between the magnetically conductive stops (7, 8).

Abstract: A control method according for an impact wrench includes ascertaining whether the impact wrench applies an impact when the drive shaft rotates in a lower speed range. The speed of the drive shaft then is increased to a higher speed range as a function of an ascertained impact during the rotation in the lower speed range.

Abstract: A striking mechanism includes a working space whose first section is surrounded by a first electromagnet and whose second section is surrounded by a second electromagnet; a striking element that can move along a striking axis inside the working space and that has a magnetizable material; an anvil whose striking surface delimits the working space in the striking direction and which protrudes into the first magnetic coil and which is made of a magnetically soft material. A spring element is provided which exerts a force onto the striking element in every position in the working space in the direction of the anvil.

Abstract: The invention relates to a fastening tool comprising a handheld housing with a piston element (1), which is received in the housing and which can be moved in a driven manner, for transmitting energy to a fixing element (3). The piston element (1) is guided in a cylinder (2) and can be accelerated towards the fixing element (3) by means of a drive force, and the piston element (1) can be held in a starting position by means of a magnetic force of a retaining element (5). The retaining element (5) has a first magnetically conductive stop (7) and a second magnetically conductive stop (8). The magnetic stops (7, 8) are connected by a magnetically conductive counter piece (9) arranged on a piston element when the piston element (1) is being held, and excitation magnet (6) is arranged between the magnetically conductive stops (7, 8).

Abstract: A screw has a head whose underside has impressions or embossings and faces towards the tip. The underside is divided into at least five sectors of the same size. Three-fifths of the sectors exhibit an identical pattern of impressions or embossings and at least one sector is provided with a different pattern of impressions or embossings or else with no impressions or embossings.

Abstract: A power tool 1 including a bit socket 6 which is configured to hold a chiseling bit 7 so that the latter can move along an axis of movement 3. A magneto-pneumatic striking mechanism 2 includes a primary drive 22 that is arranged around the axis of movement 3 and that has a first magnet coil 46, a permanently and radially magnetizable ring magnet 42 and a second magnet coil 47 arranged consecutively in the striking direction 5. On the axis of movement 3, inside the magnet coils 46, 47, the striking mechanism 2 has a striker 4 and a striking block 13 arranged consecutively in the striking direction 5. An air cushion 23 acts upon the striker 4 in the striking direction 5.

Abstract: A control method for a screw including the following steps: a spindle (14) is driven by a motor (11) in order to turn a screw (19) around an axis of rotation (15). A magnetic field is generated around the turning screw (19). A modulation of the magnetic field caused by the turning screw (19) is detected by an active magnetic-field sensor (38). A switch-off criterion is selected by a screw-recognition device (28) on the basis of the detected modulation. The turning of the screw (19) is stopped by a switch-off device (24) as soon as the switch-off criterion is met.

Abstract: A screw has a head whose underside has impressions or embossings and faces towards the tip. The underside is divided into at least five sectors of the same size. Three-fifths of the sectors exhibit an identical pattern of impressions or embossings and at least one sector is provided with a different pattern of impressions or embossings or else with no impressions or embossings.

Abstract: A control method according for an impact wrench includes ascertaining whether the impact wrench applies an impact when the drive shaft rotates in a lower speed range. The speed of the drive shaft then is increased to a higher speed range as a function of an ascertained impact during the rotation in the lower speed range.

Abstract: A striking mechanism includes a working space whose first section is surrounded by a first electromagnet and whose second section is surrounded by a second electromagnet; a striking element that can move along a striking axis inside the working space and that has a magnetizable material; an anvil whose striking surface delimits the working space in the striking direction and which protrudes into the first magnetic coil and which is made of a magnetically soft material. A spring element is provided which exerts a force onto the striking element in every position in the working space in the direction of the anvil.

Abstract: In a method for controlling a drive (4) of an electrically operated screwdriving power tool (2) during a screwdriving process, a tool holder (14) with a screw bit (16) fastened thereto is acted upon by the drive (4) to drive a fastening element (18) having a contact area (24) into a constructional component (20), with the screw bit movable up to a maximum screw-in value (Dmax) at a speed (D) and a operational torque (MA) generated between the screw bit (16) and the fastening element (18), and after it has been detected that a predetermined triggering screw-in depth (s0) has been reached, the speed (D) is reduced from the maximum screw-in value (Dmax) during a tightening process (AV), and, when it has been detected that a determined end value of the operational torque (MA) is reached, the screwdriving process is terminated.