Insert for use in retaining a cutting means in a ground drill |
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| 申请号 | EP95108814.5 | 申请日 | 1994-06-15 | 公开(公告)号 | EP0678652A3 | 公开(公告)日 | 1996-09-11 |
| 申请人 | Down Hole Technologies Pty. Ltd.; | 发明人 | McLeod, Gavin Thomas; Egan, Matthew Vance; | ||||
| 摘要 | An insert (24) is described for releasably retaining cutting means (22) in a ground drill (12). The insert is in the form of a substantially cylindrical member and is movable within the ground drill between an installation position and a retrieval position. In the installation position the insert (24) retains the cutting means in a cutting position between an outer circumferential surface (212) of the insert and an inner circumferential surface (26) of the ground drill. In the retrieval position the insert (24) is retracted to release the cutting means from between the outer circumferential surface of the insert and the inner circumferential surface of the ground drill. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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