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. 29, 2016
Filed:
Aug. 02, 2011
Applicants:
Stephen Mark Husband, Derby, GB;
Alexander Charles Smith, Holmfirth, GB;
Paul Tuohy, Stockport, GB;
Inventors:
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 5/132 (2006.01); B63H 23/24 (2006.01); F03B 13/26 (2006.01); H02K 7/14 (2006.01); H02K 17/16 (2006.01); H02K 21/14 (2006.01); B63H 1/16 (2006.01); B63H 5/15 (2006.01); B63H 5/125 (2006.01); B63H 23/00 (2006.01); F03B 17/06 (2006.01);
U.S. Cl.
CPC ...
H02K 5/132 (2013.01); B63H 23/24 (2013.01); F03B 13/264 (2013.01); H02K 7/14 (2013.01); H02K 17/16 (2013.01); H02K 21/14 (2013.01); B63H 1/16 (2013.01); B63H 5/15 (2013.01); B63H 2005/1258 (2013.01); B63H 2023/005 (2013.01); F03B 17/061 (2013.01); Y02E 10/28 (2013.01);
Abstract
A dynamo-electric machine, for example a marine propulsion unit, includes a stator and a rotor in the form of an impeller. The impeller is rim-driven and includes an annular core of ferromagnetic material, on which are provided layers in the form of an environmental enclosure and electrically conductive sleeves. Appropriate selection of the materials and thicknesses of the layers enables the starting and normal running performance of the machine to be optimized.