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:
Jul. 28, 1987
Filed:
Jan. 02, 1985
Ryoichi Hanamori, Yokohama, JP;
Hiroshi Yamamoto, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is disclosed a lens barrel incorporating a motor comprising a permanent magnet, a hollow cylindrical coil and a hollow yoke member arranged in the stated order or in an inverted order inside a fixed tube of the lens barrel, wherein a commutator is provided on the internal periphery of an end aperture of the hollow cylindrical coil while brushes are provided on the facing external periphery of the hollow magnet or yoke member, and the hollow cylindrical coil is supported at the end apertures by bearing members, and further comprising a frame supporting an imaging lens in helicoidal coupling with an annular member fixed to the hollow cylindrical coil and internally provided with a helicoid.