发明名称 |
Fastening screw and method of forming same |
摘要 |
<p>A fastening screw having an elongate shank (1), and a drilling tip (2) and a head (3) provided at respective opposite ends of the shank (1). The drilling tip (2) has a cutting edge (5) for cutting through metal and a flute (6) extending longitudinally of the shank (1). A thread (8) is formed on the shank (1) and extends over a portion of the section of the shank (1) in which the flute (6) is formed. A method of forming a fastening screw from a screw preform (9), includes deforming the preform (9) to create a drilling tip (2) which has at least one cutting edge (5) and a flute (6), and applying a thread (8) to the shank (1) in the region in which the flute (6) is formed. <IMAGE></p> |
申请公布号 |
EP0918165(A2) |
申请公布日期 |
1999.05.26 |
申请号 |
EP19980402888 |
申请日期 |
1998.11.20 |
申请人 |
W.A. DEUTSHER PTY. LTD. |
发明人 |
ROBERTS, DAVID JAMES ALEXANDER |
分类号 |
B21H3/02;F16B25/10;(IPC1-7):F16B25/10 |
主分类号 |
B21H3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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