发明公开
EP0553907A1 Thread forming screw and method of forming an internal thread in a low ductility material
失效
自攻螺钉和用于在具有低延展性的材料上形成内螺纹的方法。
- 专利标题： Thread forming screw and method of forming an internal thread in a low ductility material
- 专利标题（中）： 自攻螺钉和用于在具有低延展性的材料上形成内螺纹的方法。
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申请号： EP93200095.3申请日： 1993-01-15
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公开(公告)号： EP0553907A1公开(公告)日： 1993-08-04
- 发明人: Hertel, Paul Edward , Schneider, James Robert
- 申请人： TEXTRON INC.
- 申请人地址： 40 Westminster Street Providence, Rhode Island 02914 US
- 专利权人： TEXTRON INC.
- 当前专利权人： TEXTRON INC.
- 当前专利权人地址： 40 Westminster Street Providence, Rhode Island 02914 US
- 代理机构： Long, Edward Anthony
- 优先权： US829701 19920131; US986909 19921208
- 主分类号： F16B25/06
- IPC分类号： F16B25/06 ; F16B33/02
摘要：
A thread forming screw for cold forming internal threads in a workpiece comprised of a low ductility material, such as magnesium and the like. The screw uses primarily compressive forces to form the internal threads in the workpiece. The screw has a shank (16) having an entering end and a head end. External threads (24) are disposed on the shank (16). The external threads (24) define a thread configuration with an angle (66) measuring substantially within the range of ninety degrees to one hundred and twenty degrees.
公开/授权文献
- EP0553907B1 Thread forming screw 公开/授权日：1997-07-23
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