发明名称 |
Auxiliary walking mine support |
摘要 |
A walking mine support unit has a pair of adjacent supporting frames each having a multi-partite sole plate and a multi-partite roof shield. The sole plate and roof shield of each frame are connected only at their respective leading and trailing ends, by hydraulic rams which permit the roof shields to be raised and lowered relative to the sole plates, and by four-bar linkages which permit length-wise displacement of the roof shields parallel and relative to the sole plates. A multi-section overshield is located above each of the roof shields and connected thereto by adjustable supports. An arrangement is provided for advancing the unit in stepwise manner.
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申请公布号 |
US4175891(A) |
申请公布日期 |
1979.11.27 |
申请号 |
US19780950536 |
申请日期 |
1978.10.10 |
申请人 |
BOCHUMER EISENHUTTE HEINTZMANN GMBH AND CO |
发明人 |
BOHNES, KARLHEINZ;MARR, PETER;VON KLINGGRAFF, GERHARD |
分类号 |
E21D23/00;(IPC1-7):E21D15/44 |
主分类号 |
E21D23/00 |
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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