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. 06, 2022
Filed:
Oct. 28, 2020
Andreas Stihl Ag & Co. KG, Waiblingen, DE;
Simon Jetter, Pluederhausen, DE;
Sebastian Lechner, Waiblingen, DE;
Marc Schmid, Oppenweiler, DE;
Jan Geffers, Waiblingen-Neustadt, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A hand-guided working apparatus has a radial fan. The radial fan includes a fan impeller and an air duct, which has a spiral portion surrounding the fan impeller and has a duct cross section, which increases in the air flow direction. An outlet funnel portion adjoins the spiral portion, widens in a funnel shape in the air flow direction and has a radially inner boundary wall and a radially outer boundary wall. The outlet funnel portion ends in an air outlet opening, the outlet width of which is smaller than an outside diameter of the fan impeller. The radially inner and/or the radially outer boundary wall of the outlet funnel portion has a curvature opposed to that of the spiral portion. An intermediate wall is arranged in the outlet funnel portion, between the radially inner and the radially outer boundary wall. The intermediate wall extends with a curvature opposed to that of the spiral portion and divides the outlet funnel portion into two component portions, each widening in the shape of a funnel in the air flow direction.