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:
Mar. 10, 2015
Filed:
Nov. 10, 2011
Harald Schmid, Emmingen-Liptingen, DE;
Tobias Maier, Rottweil, DE;
Martin Mueller, Seewald, DE;
Matthias Weiss, Eberstadt, DE;
Harald Schmid, Emmingen-Liptingen, DE;
Tobias Maier, Rottweil, DE;
Martin Mueller, Seewald, DE;
Matthias Weiss, Eberstadt, DE;
EBM-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A mixed-flow fan features a housing (); an impeller () journaled rotatably with respect to the housing, and equipped with fan blades (); a generally cylindrical air conduit () defined between the fan housing and the impeller, the fan blades extending into the air conduit in order, during operation, to transport air; an external-rotor motor () having an internal stator () and an external rotor () which includes a tubular ferromagnetic yoke () partly embedded in material of the impeller. A cup-shaped yoke () fits into a central cavity () of the tubular yoke () and accommodates a permanent magnet arrangement () which interacts with the stator. The tubular yoke () and the cup-shaped yoke () together serve as a magnetic return path for the external-rotor motor. The structure minimizes damage during final assembly, and simplifies insertion of balancing weights.