| 发明名称 |
ROTARY ROCK DRILLING CHUCK |
| 摘要 |
A chuck for a drilling machine is fitted to a retractable spindle 21. Plungers 25 carried by a yoke 26 move when the yoke 26 abuts the front end 20 of the machine. This charges an accumulator carried inside the chuck body. Opening a valve 39 causes the chuck jaws to clamp while closing the valve 39 and opening a valve 55 causes the chuck jaws to relax. |
| 申请公布号 |
DE3471713(D1) |
申请公布日期 |
1988.07.07 |
| 申请号 |
DE19843471713 |
申请日期 |
1984.08.10 |
| 申请人 |
BOART INTERNATIONAL LIMITED |
发明人 |
ARMSTRONG, CHARLES JOHN |
| 分类号 |
E21B3/02;(IPC1-7):E21B19/08;E21C3/34 |
主分类号 |
E21B3/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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