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:
Nov. 12, 2013
Filed:
Oct. 18, 2012
Seiko Epson Corporation, Tokyo, JP;
Seiko Epson Corporation, , JP;
Abstract
The brushless electric machine includes a first drive member (U) having a plurality of permanent magnets (U); a second drive member () having a plurality of electromagnetic coils and capable of movement relative to the first drive member (U); and a third drive member (L) disposed at the opposite side from the first drive member (U) with the second drive member () therebetween. The second drive member () has magnetic sensors (A,B) for detecting the relative position of the first and second drive members. The third drive member (L) has at locations facing the permanent magnets of the first drive member (U) a plurality of magnetic field strengthening members (L) for strengthening the magnetic field at the location of the second drive member () in conjunction with the permanent magnets.