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:
Nov. 22, 2011
Filed:
Dec. 29, 2008
Joh Ebara, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yohei Miura, Tokyo, JP;
Takuya Uehara, Tokyo, JP;
Takuya Murata, Tokyo, JP;
Joh Ebara, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yohei Miura, Tokyo, JP;
Takuya Uehara, Tokyo, JP;
Takuya Murata, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A driving-force transmitting member is formed of a material having a linear expansion coefficient larger than that of a sleeve bearing, and Δxrt×a−Rt×b is satisfied, where Ris inner radius of the sleeve bearing, ris outer radius of a rotary shaft unit, Δxis difference between the inner radius Rand the outer radius rat a reference temperature, Δt is maximum amount of temperature change of the driving-force transmitting member relative to the reference temperature, a is linear expansion coefficient of the sleeve bearing, and b is linear expansion coefficient of the driving-force transmitting member.