| 发明名称 |
GRAEVTAND |
| 摘要 |
An excavating tooth wherein the coupling between the point and the adapter is achieved through generally helical thread means with an external lock to prevent removal by reverse rotation relative to the direction of the helical thread means. |
| 申请公布号 |
FI71808(B) |
申请公布日期 |
1986.10.31 |
| 申请号 |
FI19810001288 |
申请日期 |
1981.04.24 |
| 申请人 |
ESCO CORP |
发明人 |
HAHN FREDERICK CHARLES;BARBER JR WILLIAM RICHMOND;HAMPEL DAVID ALFRED |
| 分类号 |
E21B10/04;E02F9/28;(IPC1-7):E02F9/28 |
主分类号 |
E21B10/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
