Drive device, image forming apparatus, and grease composition
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United States of America Patent
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Oct 10, 2017
Grant Date -
Dec 3, 2015
app pub date -
May 19, 2015
filing date -
May 29, 2014
priority date (Note) -
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Abstract
A drive device includes a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft. At least one of the slide bearing and the shaft is made of a resin. The clearance is in a range of 10 to 110 μm. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap 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.
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