发明授权
- 专利标题: Mine roadway support stilt
- 专利标题(中): 矿井巷道支撑高耸
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申请号: US279403申请日: 1981-07-01
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公开(公告)号: US4382721A公开(公告)日: 1983-05-10
- 发明人: Norman S. King
- 申请人: Norman S. King
- 申请人地址: GB2
- 专利权人: Holywell Engineering Limited
- 当前专利权人: Holywell Engineering Limited
- 当前专利权人地址: GB2
- 主分类号: E21D11/18
- IPC分类号: E21D11/18 ; E21D15/22 ; E21D11/00
摘要:
A mine roadway support stilt includes, on two opposing faces thereof, a plurality of deformable, longitudinally extending indentations and, on the remaining faces, additional indentations to inhibit improper insertion of the I-beam joist support normally received in said stilt.
公开/授权文献
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