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:
Feb. 17, 1987
Filed:
Aug. 19, 1985
Nippon Soken, Inc., Nishio, JP;
Abstract
A rotary drive apparatus includes: a bar yoke, a coil mounted on the bar yoke, and a cylindrical case, having a magnetic property for receiving the coil and the bar yoke therein. The cylindrical case has at least one salient-pole portion formed on the inside thereof in the vicinity of a portion where the coil is received. The rotary drive apparatus also includes a rotary member facing the salient-pole portion and spaced from the bar yoke and the salient-pole portion by a predetermined gap, so that the rotary member rotates between the bar yoke and the salient-pole portion, and is provided with at least one magnet having opposite magnetic polarities and arranged along the circumference of the rotary member and facing the salient-pole portion. The salient-pole portion, the magnet, and an end-of-the-yoke member form a magnetic circuit. The rotary member is rotated in response to magnetic flux generated at the end of the bar yoke by applying an electric current to the coil.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile