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:
Mar. 02, 2010
Filed:
Feb. 22, 2008
Applicants:
Yukio Itami, Yokohama, JP;
Kensuke Masuda, Kodaira, JP;
Yoshihiro Takahashi, Miyagi, JP;
Tomotaka Takamura, Miyagi, JP;
Inventors:
Yukio Itami, Yokohama, JP;
Kensuke Masuda, Kodaira, JP;
Yoshihiro Takahashi, Miyagi, JP;
Tomotaka Takamura, Miyagi, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotary drive apparatus includes a rotary body with a support portion, a rotor magnet supported by the support portion of the rotary body, a fixation section facing the rotor magnet and rotatably supporting the rotary body, and a winding coil provided in the fixation section, in which an expression E/E≦0.75 is satisfied where Young's modulus of the rotor magnet is E[GPa], and Young's modulus of the support portion is E[GPa].