Valve lifter and surface treatment method thereof
US8109248B2 · kind B2 · utility
1Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Nov 5, 2008 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Jun 5, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2107
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a valve lifter, including a buffer layer, a Me diamond-like carbon layer having a thickness of 0.3˜0.6 μm, and a diamond-like carbon layer having a thickness of 1˜1.5 μm and a SP3 bonding fraction of 60˜70%, which are sequentially formed on a base body which is subjected to carbonitriding treatment. The valve lifter can exhibit superior low-friction characteristics and wear resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.