Hilti Aktiengesellschaft

Norbert Daam

Markus Hartmann

Erich Leibhard

Wolfgang Ludwig

Konrad Artmann

Thomas Thanner

Thomas Schaefer

A power tool () is provided, especially a hammer drill and/or a chiseling hammer drill, including a percussive mechanism () with a percussive element () to generate a percussive pulse onto a tool (), the element being reversibly movable along a longitudinal axis (R) by a magnetic field in order to generate the percussive pulse, and including at least a first and a second coil device () to generate the magnetic field. Each coil device () has at least a first coil ring () with a first radius (R) and a second coil ring () with a second radius (R), whereby the first radius (R) of the first coil ring () is greater than the second radius (R) of the second coil ring (), so that a space (S) is formed, at least in certain areas, between the at least first and second coil rings (), whereby a fluid (L), especially an air stream, that serves to cool the coil device () can flow through the space.

Coil spacing

A suction device () for a hand-held power tool and which is releasably connected with the power tool, includes a suction blower wheel () for producing a suction air stream in a suction path (S) and located in the device housing (), a rolling bearing () for supporting the suction blower wheel () in the device housing (), a blower shaft () for driving the suction blower wheel (), and a drive coupling () for rotatably frictionally connecting the blower shaft () with the drive shaft () of the hand-held power tool () in a connected condition of the drive shaft () with the blower shaft ().

Suction device

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.

Growing community of inventors

Oberdiessen, Germany

Norbert Daam