Hilti Aktiengesellschaft

Stefan Tichy

Walter Littmann

Adrian Kauf

Till Cramer

John Van Taack-Trakranen

J&ouml;rg Wallaschek

Stefan Liedtke

Peter Alberg

A core bit for abrasive cutting including a cylindrical tube () provided at its end surface with cutting or abrasive bodies () and a cover () provided at an opposite end surface of the cylindrical tube () and secured thereto and having, along its central axis (A), a shank () to be received in a rotary power tool, with the cover () being dimensioned, with respect to a set excitation frequency, for forming a whole number of maximum amplitude oscillations of a concentric flexural oscillation, and the cylindrical tube () being dimensioned, with respect to a set excitation frequency, for forming a whole number of maximum amplitude oscillations of axial longitudinal oscillations.

Ultrasonic annular core bit

A device for operating a tool has an ultrasound adapter with an capacitive electro-acoustic transducer ( ) connected to an electrical ultrasonic frequency generator ( ) for producing ultrasonic wave for a tool ( ) driven by the device, wherein the capacitive electro-acoustic transducer ( ) is connected with a secondary winding ( ) and the ultrasonic frequency generator ( ) is connected with a primary winding ( ) of a transformer ( ).

Device with ultrasound adapter

A method of detecting foreign bodies in a medium with a radar having a transceiver, and including emitting a radar wave through a wall surface into the medium with the transceiver, detecting a radar signal reflected in the medium, pre-processing the reflected radar signal and subjecting the pre-processed radar signal to evaluation and assessment, determining a characteristic of a foreign body at a stationary position of the transceiver with an algorithm which is based on a pre-processed, digitalized receivable signal, which characteristic permits to recognize differences between a shape of the reflected radar signal and stored comparison values, and conducting a comparison assessment of the shape differences of the reflected signal against predetermined threshold values.

Method and sensor for detecting foreign bodies in a medium with a radar

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Unterterzen, Switzerland

Stefan Tichy