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:
Dec. 18, 2001
Filed:
Nov. 12, 1999
Ryuji Suzuki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a motor or an electromagnetic driving device having a first stator yoke excitable by energizing a first coil, a second stator yoke excitable by energizing a second coil and a rotor opposed to the first and second stator yokes to be driven and rotated by energizing the first and second coils, the first and second coils are collectively arranged together in one direction on the outer side of the periphery of the rotor, and the first stator yoke is arranged in a state of being superposed on the second stator yoke to form an electromagnetic driving motor. The electromagnetic driving motor is thus arranged in a novel shape to be capable of preventing a noise of driving transmission while maintaining its adequate performance as an electromagnetic driving motor and to be compactly mountable on a camera or the like for its diaphragm device without any protruding part.