发明授权
- 专利标题： Apparatus for steering a longwall mineral mining machine
- 专利标题（中）： 转向长期采矿机的设备
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申请号： US3719394D申请日： 1971-01-11
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公开(公告)号： US3719394A公开(公告)日： 1973-03-06
- 发明人: HARTLEY D
- 申请人： COAL INDUSTRY PATENTS LTD
- 专利权人： Coal Industry Patents Ltd
- 当前专利权人： Coal Industry Patents Ltd
- 优先权： GB196570 1970-01-15
- 主分类号： E21C35/08
- IPC分类号： E21C35/08 ; E21C27/24
摘要：
The invention relates to apparatus for steering longwall mining machines. The apparatus comprises an electromagnetic-radiation emitter/detector which is mounted on the end of an arm pivotally mounted on the machine. The emitter/detector is located immediately behind the machine''s rotary cutter and is urged by a hydraulic jack so as to remain close to the roof.
信息查询
