发明授权
- 专利标题： Valve spring
- 专利标题（中）： 阀门弹簧
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申请号： US09579298申请日： 2000-05-25
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公开(公告)号： US06371464B1公开(公告)日： 2002-04-16
- 发明人: Leonard Porche , William Jeff Bertrand , Mitchell Solis
- 申请人： Leonard Porche , William Jeff Bertrand , Mitchell Solis
- 主分类号： A61M500
- IPC分类号： A61M500
摘要：
A method of making a spring are described. The spring is made by etching or cutting at least one spiral arm in a flat substrate leaving residual material around the arm. The intermediate residual material is either pushed or lifted to form a conical spring.
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