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:
Apr. 19, 2005
Filed:
Jan. 20, 2004
Georg Maier, Kernen, DE;
Fritz Kiesewetter, Stuttgart, DE;
Andreas Bähner, Weinstadt, DE;
Ralf Tuckermann, Stuttgart, DE;
Axel Klimmek, Schwaikheim, DE;
Georg Maier, Kernen, DE;
Fritz Kiesewetter, Stuttgart, DE;
Andreas Bähner, Weinstadt, DE;
Ralf Tuckermann, Stuttgart, DE;
Axel Klimmek, Schwaikheim, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
An intake system for preparing combustion air () is for an internal combustion engine of a portable handheld work apparatus. The intake system includes: a carburetor (); an air filter () which is connected upstream of the carburetor (); and, a filter case () which closes the air filter () from the outside. A combustion air channel () leads from a take-up opening () in a cooling air fan () of the engine to an inlet opening () in the filter case (). The filter case () includes at least one defined ventilation opening () for connecting an inner space () of the filter case () to the ambient air. The flow cross section of the ventilation opening () is so designed that the airflows through the inlet opening (), the intake opening () of the carburetor () and the ventilation opening () are compensated at the rated rpm of the engine and that a uniform pressure level adjusts in the inner space () of the filter case ().