The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2007
Filed:
Dec. 05, 2005
Stefan Hammerstingl, Munich, DE;
Bernd Runau, Ingolstadt, DE;
Stefan Hammerstingl, Munich, DE;
Bernd Runau, Ingolstadt, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
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 ().