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:
Sep. 27, 2005
Filed:
Sep. 29, 2003
Georg Maier, Kernen, DE;
Fritz Kiesewetter, Stuttgart, DE;
Georg Maier, Kernen, DE;
Fritz Kiesewetter, Stuttgart, DE;
Andreas Stihl AG. & Co. KG, Waiblingen, DE;
Abstract
A fan arrangement of a portable handheld work apparatus is driven by an internal combustion engine and includes a radial fan () which includes a fan wheel () and a spirally-shaped fan housing () which encloses the fan wheel () at least partially. A take-out opening () is provided in the radial fan () in the region of the moved air flow () for diverting a combustion air flow () for the engine. The combustion air flow () is branched off from the air flow (). In the radial direction outside of the fan wheel (), there is an aerodynamically formed guide ramp () provided in the air flow () which rises in the axial direction. The take-out opening () is arranged downstream of the guide ramp ().