Chain drive system
US7572200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2004 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2080/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.