| 发明名称 |
Twist drill |
| 摘要 |
A twist drill including a spiral-forming hollow shaft (3) having a spiral-shaped inner surface, and drilling head(5) and shank (6) connected with the shaft (3) at its opposite ends, respectively; and a method for forming such a twist drill.
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| 申请公布号 |
US2002170752(A1) |
申请公布日期 |
2002.11.21 |
| 申请号 |
US20010859871 |
申请日期 |
2001.05.17 |
| 申请人 |
SAITTA ROBERT S.;WELLS TROY D.;PUTZI CHRISTIAN |
发明人 |
SAITTA ROBERT S.;WELLS TROY D.;PUTZI CHRISTIAN |
| 分类号 |
B23B51/00;B21H3/10;B23B51/02;B23P15/32;B28D1/14;E21B10/44;(IPC1-7):E21B10/44 |
主分类号 |
B23B51/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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