| 发明名称 |
Rocker arm and method of manufacturing the same |
| 摘要 |
A rocker arm 1 made of sheet metal is formed so that Vickers hardness H<SUB>v </SUB>of the surface layer portion 9 a of the valve stem receiver 9 is set at H<SUB>v </SUB>650 to 800 and a quantity of the retained austenite gammaR is set at 25 to 35 vol %.
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| 申请公布号 |
US2005166879(A1) |
申请公布日期 |
2005.08.04 |
| 申请号 |
US20050033470 |
申请日期 |
2005.01.12 |
| 申请人 |
KOYO SEIKO CO., LTD. |
发明人 |
MOTOHASHI NOBUTSUNA |
| 分类号 |
F01L1/047;F01L1/18;F01L3/02;(IPC1-7):F01L1/18 |
主分类号 |
F01L1/047 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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