Hilti Aktiengesellschaft

Klaus Dass

Roland Schaer

Harald Schmitzer

Christoph W&uuml;rsch

Stefan Liedtke

John Ewen

A radar detector for exploration of subsurface embedded objects comprising an antenna array ( ) for high-frequency electromagnetic waves, which is connected and individually switchable with at least one transmit/receive unit, a time-controlled signal processor, an evaluation device for SAR and a display device. The antenna array ( ) exhibiting at least three antennas (sx, rx, sy, ry) scanning an area by their positioning.

Subsurface exploratory radar detector for a hand tool device

A positioning aid ( ) for a hand tool device ( ) driving tool ( ), in a working direction (A), with a distance measuring system ( ) mounted thereon. The distance measuring system ( ) has at least one distance measuring sensor ( ) for measuring the distance from the distance measuring sensor ( ) to an object ( ), along a line of measurement (M, M&prime;, M&Prime;), and a computing unit ( ) for comparing the measured value with a pre-selected desired value (S) and for producing a signal dependent on the comparison, wherein the line of measurement (M, M&prime;) is oriented at least partially perpendicular to the working direction (A).

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Sax, Switzerland

Klaus Dass