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:
Sep. 01, 2020
Filed:
Dec. 27, 2017
Rolls-royce North American Technologies, Inc., Indianapolis, IN (US);
Rolls-royce Plc, London, GB;
David Loder, Carmel, IN (US);
Ellis Fui Hen Chong, Derby, GB;
Edward Claude Rice, Indianapolis, IN (US);
Rolls Royce North American Technologies, Inc., Indianapolis, IN (US);
Rolls Royce PLC, London, GB;
Abstract
A rotor assembly with a rotor hub, a plurality of permanent magnets positioned circumferentially around at least a portion of the rotor hub, and a coating on at least a portion of the plurality of permanent magnets. The coating forming a retaining band that circumferentially extends around the rotor hub and the plurality of permanent magnets. The coating includes a nano-crystalline layer including a metal or metal alloy and defines an average grain size of less than about 50 nanometers (nm).