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:
May. 29, 2018
Filed:
May. 20, 2015
Toshiyuki Kabata, Kanagawa, JP;
Kumiko Seo, Kanagawa, JP;
Masahiro Ishida, Kanagawa, JP;
Naoki Matsuda, Kanagawa, JP;
Teruyoshi Tanaka, Kanagawa, JP;
Toshiyuki Kabata, Kanagawa, JP;
Kumiko Seo, Kanagawa, JP;
Masahiro Ishida, Kanagawa, JP;
Naoki Matsuda, Kanagawa, JP;
Teruyoshi Tanaka, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A drive device includes a plurality of gears; and a grease composition that is held on a tooth flank of at least one gear of the gears. The at least one gear is made of a resin. The grease composition contains a hydrocarbon base oil, lithium soap serving as a thickener, and olefin resin powder. A weight ratio between the hydrocarbon base oil and the lithium soap in the grease composition is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.