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. 19, 1978
Filed:
Oct. 31, 1975
Yukuo Karube, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Seiki Kabushiki Kaisha, Tokyo, JP;
Abstract
A brushless motor has a rotor composed of a permanent field magnet, an armature functioning as stator and a position detecting element for detecting the positions of magnetic poles of said permanent magnet rotor and accordingly switching the electric current to an armature coil body of said stator thereby causing rotary motion of said permanent magnet rotor. Said armature coil body contains plural coils of given number of turns in a polygonal form of which at least two sides are placed parallel to the rotary axis of motor. Said coils are mutually arranged in a partially overlapping relationship to form a cylindrical body with one of said two sides being located at the internal surface of said cylindrical body while the other side is located at the external surface thereof so as to compose a coreless cylindrical armature body.