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. 22, 2022
Filed:
May. 22, 2018
Applicant:
Ziehl-abegg SE, Künzelsau, DE;
Inventor:
Frieder Loercher, Braunsbach, DE;
Assignee:
ZIEHL-ABEGG SE, Künzelsau, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/70 (2006.01); F04D 29/66 (2006.01); F04D 29/42 (2006.01); F04D 29/44 (2006.01); F04D 29/54 (2006.01);
U.S. Cl.
CPC ...
F04D 29/667 (2013.01); F04D 29/4213 (2013.01); F04D 29/444 (2013.01); F04D 29/542 (2013.01); F05D 2250/51 (2013.01); F05D 2260/607 (2013.01);
Abstract
A fan (radial or axial fan), with an impeller and with a preguide device in the flow path in front of the impeller, preferably in front of the inlet region of an inlet nozzle, has the preguide device as a preguide grid with webs and/or guide vanes which are arranged and shaped such that flow influencing in the circumferential direction occurs for a substantially swirl-free inflow.