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:
Mar. 22, 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 an internal combustion engine, especially of a portable handheld work apparatus, includes a fan wheel () and a spirally-shaped fan housing at least partially enclosing the fan wheel. A take-out opening () is provided in the fan arrangement at 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. The take-out opening () is arranged in radial direction directly outside of the fan wheel () and is so configured that the take-out opening () defines a window () which, referred to the flow direction (S), has a small width at a forward edge and that the width as well as the depth of the window () increases to a rearward edge.