发明名称 |
Fail safe locking overshot device |
摘要 |
A fail safe locking overshot device. The overshot device is connected to a hoisting line for retrieval of a spearhead. The device provides automatic engagement of a mechanical locking system through locking dogs for locking the lifting dogs after capture of a spearhead. Manual disengagement is required to unlock the lifting dogs and release the spearhead. |
申请公布号 |
AU2011334515(A1) |
申请公布日期 |
2013.05.02 |
申请号 |
AU20110334515 |
申请日期 |
2011.11.22 |
申请人 |
ATLAS COPCO CANADA INC. |
发明人 |
SALVADOR, PATRICK;LAMBERT, PAUL |
分类号 |
E21B31/18 |
主分类号 |
E21B31/18 |
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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