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:
Jan. 19, 2010
Filed:
Jul. 08, 2004
Anders Kohler, Landvetter, SE;
Anders Reuterberg, Lerum, SE;
Niklas Sundberg, Alingsas, SE;
Husqvarna AB, Huskvarna, SE;
Abstract
A portable, hand-held, combustion engine powered working machine comprises a tool unit () including a rotatable working tool (), and a machine unit () including an internal combustion engine (), an assembly () for supplying air and fuel to the engine, and an air cleaning system, which comprises a filter assembly () including at least two filters (), referred to as pre-filter () and main filter (), for cleaning the air that shall be supplied to the engine. The pre-filter is accommodated in an upper filter chamber () between a top cover () and a pre-filter bottom (), and the main filter is accommodated in a lower filter chamber under the pre-filter bottom, said lower filter chamber being defined by the underside of the pre-filter bottom, a second filter bottom () at a distance from the pre-filter bottom, and a closed, circumferential wall () between the pre-filter bottom and the second filter bottom, said closed, circumferential wall forming a downwards directed protrusion on the underside of the upper filter bottom.