发明名称 |
Device for mining of thick strata of useful minerals |
摘要 |
A device for mining thick coal strata comprising a plough pressed in the region of the floor by a ram, whereas in the vicinity of the roof the plough is pressed by a unit fixed to a canopy of the lining. The unit is provided with guides on which the plough is supported through a slide. A lever of a distributor is deflected by the plough and causes the unit to extend by an amount equal to the web of the plough.
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申请公布号 |
US4240666(A) |
申请公布日期 |
1980.12.23 |
申请号 |
US19790022264 |
申请日期 |
1979.03.20 |
申请人 |
CENTRALNY OSRODEK PROJEKTOWOKONSTRUKCYJNY MASZYN GORNICZYCH KO |
发明人 |
PODGORSKI, WOJCIECH;STAS, JUSTYN |
分类号 |
E21C35/14;E21D23/00;(IPC1-7):E21C27/34 |
主分类号 |
E21C35/14 |
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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