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:
Jul. 23, 2013
Filed:
Oct. 06, 2010
Wolfgang Kienzle, Remseck, DE;
Martin Rieber, Stuttgart, DE;
Wolfgang Kienzle, Remseck, DE;
Martin Rieber, Stuttgart, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
The invention relates to a portable, hand-held work apparatus such as a chain saw, a cut-off machine, a brush cutter or the like with an air cooled combustion engine. A cooling air blower () which includes a cooling air spiral () and a fan wheel (), moves a cooling air flow () for cooling the combustion engine. Further a combustion air channel () leads from the cooling air blower () to the combustion engine () and branches off from an air output window () provided in the base () of the cooling air spiral (). The diverting device () includes a guide wall () which extends into the cooling air spiral () between the fan wheel () and the air output window (). In order to divert a large volume of combustion air () with minimal disruption to the cooling air flow, the pass-through cross-section of the air output window () tapers in the direction of the diverted combustion air () from a first pass-through area () to a second pass-through area ().