发明名称 |
SELF ADVANCING MINE ROOF SUPPORT |
摘要 |
A self-advancing mine-roof support 10 has a double acting hydraulic ram 28 within the support connected to the support base 12 and to a relay bar 24 for coupling to an anchorage forward of the support and a ram 31 for lifting of the support base in relation to the relay bar. The rearward end of the relay bar is pivotally connected approximately to the midpoint of the hydraulic ram 28 and the relay bar 24 is of box section construction. <IMAGE> |
申请公布号 |
AU8949082(A) |
申请公布日期 |
1983.09.08 |
申请号 |
AU19820089490 |
申请日期 |
1982.10.19 |
申请人 |
DOBSON PARK INDUSTRIES PLC |
发明人 |
KENNETH DAVID PRESCOT;CHARLES JOHN HOLLAND |
分类号 |
E21D23/08 |
主分类号 |
E21D23/08 |
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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