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:
Jul. 08, 2014
Filed:
Jul. 21, 2008
Rainer Strohm, St. Georgen, DE;
Tobias Maier, Rottweil, DE;
Volker Hildebrand, Rust, DE;
Juergen Pfaff, Herbolzheim, DE;
Arno Karwath, Deisslingen, DE;
Rainer Strohm, St. Georgen, DE;
Tobias Maier, Rottweil, DE;
Volker Hildebrand, Rust, DE;
Juergen Pfaff, Herbolzheim, DE;
Arno Karwath, Deisslingen, DE;
EBM-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor () has a stator () and a rotor (). The latter is equipped with a cup-like rotor part () and with a ring magnet () adhesively bonded therein, which magnet has an outer circumference () on which are provided elevations () and depressions () that extend at least partly in the longitudinal direction of the ring magnet (). The outer circumference () of the ring magnet (), that faces toward the cup-like rotor part () after assembly, is formed with at least one opening or channel (), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet () and the cup-like rotor part ().