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:
Oct. 22, 2013
Filed:
Jul. 26, 2006
Ryoichi Fukumoto, Nagoya, JP;
Tomoaki Nishimura, Kariya, JP;
Tsutomu Takeuchi, Gamagori, JP;
Hiroyasu Onai, Isesaki, JP;
Takashi Yamaguchi, Kiryu, JP;
Ryoichi Fukumoto, Nagoya, JP;
Tomoaki Nishimura, Kariya, JP;
Tsutomu Takeuchi, Gamagori, JP;
Hiroyasu Onai, Isesaki, JP;
Takashi Yamaguchi, Kiryu, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-Shi, Aichi-Ken, JP;
Ogura Clutch Co., Ltd., Kiryu-Shi, Gunma-Ken, JP;
Abstract
A drive device is provided with a housingand an electromagnetic clutch mechanismaccommodated in the housing. The electromagnetic clutch mechanismis provided with an armaturerotatably supported in the housing, a rotorarranged to face the armatureand rotatably supported in the housing, and a coil. An annular magnetis fixed on the outer circumference surface of the rotor. A sensorarranged inside the housingdetects a polarity change of the magnetin association with rotation of the rotor. The magnetis provided with an annular wall portionextending toward the armaturebeyond a surface on which the armatureis in contact with the rotorwith respect to the axial direction. The annular wall portionis spaced radially outward from the armature. The annular wall portionprevents abrasion powder produced on actuation of the electromagnetic clutch mechanismfrom being scattered.