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:
Dec. 02, 2025
Filed:
Dec. 22, 2022
Applicant:
Ziehl-abegg SE, Künzelsau, DE;
Inventors:
Frieder Loercher, Braunsbach, DE;
Andreas Gross, Kirchensall, DE;
Assignee:
ZIEHL-ABEGG SE, Künzelsau, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04D 25/06 (2006.01); F04D 29/28 (2006.01); F04D 29/32 (2006.01); F04D 29/44 (2006.01);
U.S. Cl.
CPC ...
F04D 29/441 (2013.01); F04D 25/06 (2013.01); F04D 29/281 (2013.01); F04D 29/326 (2013.01);
Abstract
A fan, in particular an axial or diagonal fan, comprising a housing and an impeller arranged therein and driven by an electric motor and having vanes extending between a hub ring and a cover ring, wherein a step diffuser is formed in the form of an abrupt expansion of the flow cross-section in the direction of flow downstream of the impeller and after exiting the region of the cover ring.