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US 9,982,213 B2Granted
Drive device, image forming apparatus, and grease composition
AssigneeRicoh Company, Ltd.
InventorsToshiyuki Kabata, Kumiko Seo, Masahiro Ishida, Naoki Matsuda, Teruyoshi Tanaka
Life of this patent
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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.
Claims12
A drive device comprising:
- a plurality of gears;
- and
- a grease composition on a tooth flank of at least one of the plurality of gears, wherein
- the at least one of the plurality of gears includes a resin,
- the grease composition contains a hydrocarbon base oil, lithium soap serving as a thickener, and a solid lubricant including 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, and
- a consistency of the grease composition is in a range of 360 to 400.
4 more elements
Dependencies are inferred from the claim text.