发明名称 |
Bearer plate |
摘要 |
A bearer plate for use with rock bolts or friction rock stabilisers has a plate with an earth engaging surface and an aperture. A wall circumscribes the aperture and extends generally away from the plane of the plate. The wall includes a plurality of spaced apart rib formations that extend in a generally radial direction from the aperture. The direction of indentation of the ribs into the wall is opposite to the expected direction of deformation of the wall when subjected to a compressive load applied in the axial direction of the aperture.
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申请公布号 |
US5628587(A) |
申请公布日期 |
1997.05.13 |
申请号 |
US19950510408 |
申请日期 |
1995.08.02 |
申请人 |
TRU-DI TOOL MANUFACTURING CO., PTY. LTD. |
发明人 |
LESSLIE, JOHN G. |
分类号 |
E21D21/00;(IPC1-7):E02D3/12;E21D19/00;E21F17/00 |
主分类号 |
E21D21/00 |
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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