| 发明名称 |
Method for manufacturing a ball head polygonal wrench |
| 摘要 |
A method for manufacturing a star-shaped ball head polygonal wrench includes step 1 to step 3. Step 1 is to obtain a cylindrical body. Step 2 is to cut the near end portion of the cylindrical body to form a neck portion. Step 3 is to roll the head and neck portion of the cylindrical body to form a ball head.
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| 申请公布号 |
US2004128821(A1) |
申请公布日期 |
2004.07.08 |
| 申请号 |
US20030336321 |
申请日期 |
2003.01.02 |
| 申请人 |
HUANG MING-YUAN |
发明人 |
HUANG MING-YUAN |
| 分类号 |
B21H1/00;B21H7/00;B21K5/00;B23P15/00;B25B15/00;(IPC1-7):B23P13/04 |
主分类号 |
B21H1/00 |
| 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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