Hilti Aktiengesellschaft

Bernd Runau

Stefan Hammerstingl

An electric power tool includes a percussion mechanism () located in an external housing () of the power tool () and driven by a driving motor () connected with the percussion mechanism () by a gear unit (). An arrangement for cooling the power tool () includes a fan element () located in the external housing for generating a cooling air flow (), a cooling air channel () extending along a longitudinal extent of the percussion mechanism () and a cross-section of which has a constriction (), a fresh air channel () having an intake opening () for communicating with atmosphere and formed in the external housing () and a connection opening () for communicating with the cooling air channel () and arranged in an area of the constriction () of the cooling air channel ().

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Ingolstadt, Germany

Bernd Runau