| Original document(53 pages) 中文版 |
The present invention is a lightweight threaded bolt type fastener (12) having a shank (21) with a large diameter portion (22) and small diameter portion (28) connected by a transition portion (26); a thread is roll formed on the small diameter portion (22) and terminates in a run-out section (34) where the thread gradually decreases in root depth and width and with the run-out section being of minimal axial length and being located closely adjacent the transition portion (26) to produce a run-out zone of minimal axial length. A rolling die (46, 46') for forming the thread (29) with minimal thread run-out having ridge segments (57) with tapered end surfaces (64) for providing the run-out thread with an end wall (35) parallel to the transition (26) portion and a method of making the bolt type fastener. |
Application Number
申请号 |
99812743 |
Application Date
申请日 |
1999.10.05 |
| Title 名称 |
Lightweight threaded fastener and thread rolling die |
Publication Number
公开号 |
1398325 |
Publication Date
公开日 |
2003.02.19 |
| Approval Pub. Date |
|
Granted Pub. Date |
|
| International Classification 分类号 |
F16B35/00;F16B35/04 |
Applicant(s) Name
申请人 |
Huck International, Inc |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Michael U. March |
| Attorney & Agent 代理人 |
sun zheng |
| More information 更 多 信 息 |
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