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:
Feb. 15, 2022
Filed:
Mar. 02, 2020
Ebm-papst Mulfingen Gmbh & Co. KG, Mulfingen, DE;
Oliver Haaf, Kupferzell, DE;
Thorsten Pissarczyk, Gemmingen, DE;
ebm-papst Mulfingen GmbH & Co. KG, Mulfingen, DE;
Abstract
An axial ventilator has multiple fan wheel blades () arranged around an axis of rotation (RA) in a blade ring. At least one of the fan wheel blades () has an inner section () located on the radial inside. A blade edge section () directly adjoins the inner section () and borders a blade edge (). The at least one fan wheel blade () has a local projection () over a radial extension of the blade edge section (). The local projection () is formed as an extension of the chord length of the fan wheel blade. The projection locally enlarges the fan wheel blade () in the blade edge section (). An average angle of attack (α) of the fan wheel blade (), in relation to a plane of rotation (RE), of the fan wheel (), is larger than an average angle of attack (β) of the projection (), in relation to the plane of rotation (RE).