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:
Apr. 27, 2004
Filed:
Aug. 30, 2002
Junichi Murano, Saitama-Ken, JP;
Kazuyoshi Matsumoto, Tokyo, JP;
Katsunori Shoji, Kanagawa-Ken, JP;
Osamu Takashima, Tokyo, JP;
Toshiyuki Uchida, Kanagawa-Ken, JP;
Kiyoshi Tsukamura, Kanagawa-Ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A driving device, which can maintain a sufficient rated torque of the non-magnetization type electromagnetic clutch, comprises a driving motor and a driving gear. The driving motor and the driving gear are connected by a non-magnetization type electromagnetic clutch. The electromagnetic clutch comprises a driving shaft, wherein the driving shaft of the electromagnetic clutch is made of non-magnetic material. Because the driving shaft is made of non-magnetic material, therefore the magnetic field of the permanent magnet is not adversely affected or disordered, and a stable rated torque can be achieved.