| 发明名称 |
Production of ground bores and-or destruction of old pipe conduits underground |
| 摘要 |
A static stop pawl (110) and/or an advance feed pawl (120) connected with the drive is provided. The pawls have slide surfaces, and have a Y-shaped cross-section. The drill stem comprises interconnected sections, coupled with clearance. The thrust and traction drive is arranged on a slide (90) with a linear drive in the form of a double-acting cylinder (80).
|
| 申请公布号 |
DE19814232(C1) |
申请公布日期 |
1999.10.28 |
| 申请号 |
DE19981014232 |
申请日期 |
1998.03.30 |
| 申请人 |
TRACTO-TECHNIK PAUL SCHMIDT SPEZIALMASCHINEN |
发明人 |
PUETTMANN, FRANZ-JOSEF;RIEKES, ANDREAS;PRUTTI, FRANK;KAUFMANN, BERNHARD |
| 分类号 |
E21B7/04;E21B7/20;E21B7/30;E21B17/02;E21B17/046;E21B17/20;E21B19/086;E21B44/06;F16L55/165;(IPC1-7):F16L1/06;E21B17/04 |
主分类号 |
E21B7/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
