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:
Jun. 19, 1984
Filed:
Sep. 30, 1982
Hidetaka Furusho, Kakuda, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A brushless D.C. motor which can provide a speed detection signal or position detection signal continuously even when the speed of rotation of the rotor is reduced includes a ring-shaped driving magnet magnetized to develop N and S poles alternatively; a rotary yoke having a plurality of flanges extending from the outer peripheral edge thereof toward a stationary yoke substantially to the middle of the outer peripheral end surface of the driving magnet in such a manner as to embrace the driving magnet, the flanges extending over two adjacent magnetic poles of different polarities at the boundary between these magnetic poles; and a magnetic-electric transducer element disposed at a position spaced from and opposing to the path of rotation of the flange surfaces adjacent to the stationary yoke and spaced from and opposing to the path of rotation of the outer peripheral end surface of the driving magnet.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile