Hilti Aktiengesellschaft

Egon Koenigbauer

Hans Appel

Markus Forstner

Oliver Koslowski

Stefan Groer

Michael Fuchs

A suction module for a hand-held power tool includes a motor-driven fan wheel, an intake channel for sucking in dust-laden air, and a collecting container for dust. A flow sensor has a sensor surface, which is formed of plastic and is arranged in the intake channel, an electric field meter facing the sensor surface for determining the electrostatic field strength on the sensor surface, and an evaluating unit for determining a flow rate of dust-laden air on the basis of the determined electrostatic field strength.

Hand-held power tool

A method to control a power tool (), especially a handheld core drilling machine, includes a drive () to drive a tool () and a control unit () for when a workpiece (W) is being processed. The method encompasses the following method steps: The power tool includes a drive () to drive a tool () and a control unit () to control at least the rotational speed of the drive.

Intuitive, adaptive drilling function

A suction device with a hand-held power drill is disclosed. The suction device has a housing and a locking mechanism for fastening the housing to a housing of the hand-held power drill. The suction device furthermore has a fan motor and a controller for the fan motor. The controller contains a sensor for detecting the operating state of an electric motor of the hand-held power tool. The controller is configured to activate the fan motor when the electric motor is in a rotating state of operation.

Growing community of inventors

Eichenau, Germany

Egon Koenigbauer