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:
Oct. 01, 2013
Filed:
Jul. 02, 2009
Christopher G. Bright, Nottingham, GB;
Huw L. Edwards, Swansea, GB;
Christopher G. Bright, Nottingham, GB;
Huw L. Edwards, Swansea, GB;
Rolls-Royce PLC, London, GB;
Abstract
A magnetic gear arrangement having a first gear member for generating a first magnetic field and a second gear member for generating a second magnetic field. An interpole member is provided between the first and second gear members for coupling the two magnetic fields and controlling the gear ratio between the two gear members. The interpole member includes a unitary body of magnetizable material and associated control wiring, and is arranged such that when current is passed through the wiring, space regions of the unitary body are magnetized by an electrically-induced magnetic field. Discrete interpoles, the number and spacing of which define the gear ratio, are then formed in the unitary body between adjacent magnetized regions.