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:
Aug. 31, 2021
Filed:
Mar. 28, 2018
Ebm-papst St. Georgen Gmbh & Co. KG, St. Georgen, DE;
Peter Ragg, Schönwald, DE;
Christian Moosmann, Königsfeld, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A radial fan that includes a fan wheel, which can be rotated about an axis and which comprises a base plate and airfoils protruding from the base plate, wherein the airfoils each comprise an upstream edge in a first spacing (r) from the axis and a downstream edge in a second spacing (r) from the axis, and an end wall, which together with the base plate, delimits a flow channel in which the airfoils engage. The cross-sectional area (A) of the flow channel between the upstream edge and the downstream edge passes through a maximum in a third spacing (r) from the axis. The difference between a fourth spacing (r) and a fifth spacing (r), at which the cross-sectional area (A) in each case assumes nearest adjacent minima to the maximum, is at least half of the difference (r−r) between the first and the second spacing.