发明申请
- 专利标题： Screw for Composite/Plastic Materials
- 专利标题（中）： 复合/塑料材料螺丝
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申请号： US14057031申请日： 2013-10-18
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公开(公告)号： US20140044500A1公开(公告)日： 2014-02-13
- 发明人: Joseph A. Pieciak, JR. , Richard L. Belinda , Peter Barenski , Tad A. Weiss
- 申请人： Joseph A. Pieciak, JR. , Richard L. Belinda , Peter Barenski , Tad A. Weiss
- 主分类号： F16B25/00
- IPC分类号： F16B25/00 ; F16B35/06
摘要：
A fastener for composite or plastic material having a dense composition employs a head which has a socket and a recessed underside and a lower rim. In one embodiment, the shank has an upper portion with an enlarged diameter and a left hand thread while the lower portion has a tri-lobed configuration and is traversed by a right hand thread. The right hand thread may have a plurality of notches which, in one embodiment, are arranged in a spiral array.