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. 22, 2015
Filed:
Nov. 01, 2010
Ernst Gorenflo, Bad Rappenau, DE;
Eberhard Schieber, Backnang, DE;
Heinrich Leufen, Schwaikheim, DE;
Michael Harrer, Stuttgart, DE;
Claus Naegele, Stuttgart, DE;
Andreas Neubauer, Ludwigsburg, DE;
Ernst Gorenflo, Bad Rappenau, DE;
Eberhard Schieber, Backnang, DE;
Heinrich Leufen, Schwaikheim, DE;
Michael Harrer, Stuttgart, DE;
Claus Naegele, Stuttgart, DE;
Andreas Neubauer, Ludwigsburg, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A portable, handheld work apparatus such as a chain saw has a handle () to guide the work apparatus () and has an air-cooled, mixture-lubricated combustion engine () arranged in a casing as a drive for a work tool (). The cylinder () has a combustion chamber () formed therein to which an air/fuel mixture is supplied. The air/fuel mixture is ignited by a spark plug () which projects into the combustion chamber (). An ignition control () triggers a spark in dependence on the angular position of the crankshaft (). A temperature sensor () is provided to control the cylinder temperature. The temperature signal of the temperature sensor () is connected to a power control (). When a predetermined temperature is exceeded, the power control () changes the operating parameters of the combustion engine () in such a manner that the power of the combustion engine () is changed.