发明授权
- 专利标题: Valve lifter and method of producing the same
- 专利标题(中): 气门挺杆及其制造方法
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申请号: US44201申请日: 1987-04-30
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公开(公告)号: US4829950A公开(公告)日: 1989-05-16
- 发明人: Hisanobu Kanamaru , Yosimi Sugaya
- 申请人: Hisanobu Kanamaru , Yosimi Sugaya
- 申请人地址: JPX Tokyo JPX Chiba
- 专利权人: Hitachi, Ltd.,Hitachi Powdered Metals
- 当前专利权人: Hitachi, Ltd.,Hitachi Powdered Metals
- 当前专利权人地址: JPX Tokyo JPX Chiba
- 优先权: JPX61-97966 19860430
- 主分类号: B21C23/20
- IPC分类号: B21C23/20 ; B21D53/84 ; B21K1/20 ; B21K21/14 ; F01L1/14 ; F01L1/46
摘要:
A valve lifter has a cylindrical lifter body portion made of an alloy tool steel which body portion extends in the axial direction of the valve lifter, and a head portion made of the alloy tool steel and formed integrally with the body portion which head portion extends at a right angle to the axis. The head portion has an outer surface constituting a cam-contact surface provided with a coating layer, and an inner surface constituting a valve-pressing portion provided with a valve-pressing protrusion. The head portion has a macrostructure of plastic flow oriented in a direction perpendicular to the above-mentioned axis. Disclosed also is a method for producing this valve lifter.
公开/授权文献
- USD424109S Pen 公开/授权日:2000-05-02
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