Invention Grant
- Patent Title: Rocker arm and method of manufacturing the same
- Patent Title (中): 摇臂和制造方法相同
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Application No.: US11033470Application Date: 2005-01-12
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Publication No.: US07185619B2Publication Date: 2007-03-06
- Inventor: Nobutsuna Motohashi
- Applicant: Nobutsuna Motohashi
- Applicant Address: JP Osaka
- Assignee: Koyo Seiko Co., Ltd.
- Current Assignee: Koyo Seiko Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: McGinn IP Law Group, PLLC
- Priority: JPP2004-005383 20040113
- Main IPC: F01L1/18
- IPC: F01L1/18
Abstract:
A rocker arm 1 made of sheet metal is formed so that Vickers hardness Hv of the surface layer portion 9a of the valve stem receiver 9 is set at Hv 650 to 800 and a quantity of the retained austenite γR is set at 25 to 35 vol %.
Public/Granted literature
- US20050166879A1 Rocker arm and method of manufacturing the same Public/Granted day:2005-08-04
Information query
