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. 18, 2014
Filed:
Dec. 19, 2011
Werner Geyer, Berglen, DE;
Mark Reichler, Remshalden, DE;
Robert Köhli, Winnenden, DE;
Evelyn Kullik, Gerlingen, DE;
Helmut Schlessmann, Waiblingen, DE;
Werner Geyer, Berglen, DE;
Mark Reichler, Remshalden, DE;
Robert Köhli, Winnenden, DE;
Evelyn Kullik, Gerlingen, DE;
Helmut Schlessmann, Waiblingen, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
An engine has a cylinder wherein a reciprocating piston is mounted. The piston drives, via a connecting rod (), a crankshaft () pivotably mounted in a crankcase. The connecting rod is connected to the piston via a piston pin. An inlet window for combustion air is provided and controlled by the piston. The piston separates a combustion chamber from the crankcase interior space and has a piston base the underside of which is oriented toward the crankcase. To achieve good cooling of the piston and of the piston pin bearing, a first flow-guide element is provided within the crankcase interior space adjacent to the inlet window. The first flow-guide element redirects the combustion air flowing in through the inlet window in the direction of the underside of the piston base.