| 发明名称 |
Device in impact machines. |
| 摘要 |
<p>The device comprises a first chamber (5) which is connected to an accmulator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to damp the recoil from the set of rods.</p> |
| 申请公布号 |
EP0389454(A1) |
申请公布日期 |
1990.09.26 |
| 申请号 |
EP19900850036 |
申请日期 |
1990.01.25 |
| 申请人 |
ATLAS COPCO MCT AB |
发明人 |
RODERT, JOERGEN ALF ROBERT;ANDERSSON, KURT HOLGER |
| 分类号 |
E21B7/20;B25D9/06;B25D17/08;B25D17/24;E21B6/00 |
主分类号 |
E21B7/20 |
| 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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