US Patent 7572200 Chain drive system
Patent 7572200 was granted and assigned to NISSAN MOTOR CO.,LTD. on August, 2009 by the United States Patent and Trademark Office.
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A chain drive system includes a drive sprocket, a driven sprocket and a chain looped over the drive sprocket and the driven sprocket. The chain and the sprocket having respective sliding surfaces slidable relative to each other in the presence of lubricating oil, and any adjacent chain components of the chain having respective sliding surfaces slidable relative to each other in the presence of lubricating oil. At least one of the sliding surfaces between the chain and the sprocket and at least one of the sliding surfaces between any adjacent chain components have hard carbon coatings formed on base portions thereof. Each of the hard carbon coatings has a hydrogen content of 10 atomic % or less.
US Patent 07572200 Chain drive system US Patent 7572200 Chain drive system
US Patent 07572200 Chain drive system
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