发明名称 |
Square embossed roof and rib plate |
摘要 |
Disclosed is a mine roof and rib support system generally including a square bearing plate. A through hole is positioned near a center portion of the square bearing plate. A peripheral section at least partially circumscribes the bearing plate. In between the through hole and the peripheral section is a rib member area. The rib member area may include two rib members with a convex cross-section connected by a substantially linear surface member disposed between the two rib members, two or more concave ribs with a substantially linear surface member disposed between the two rib members, or two substantially linear surfaces connected by a convex rib member. A safety edge surrounds the square bearing plate. The safety edge may be a rolled edge, a looped edge, a folded edge, or another comparable edge. Also disclosed is a method for making the mine roof and rib support system.
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申请公布号 |
US2004018062(A1) |
申请公布日期 |
2004.01.29 |
申请号 |
US20030457840 |
申请日期 |
2003.06.09 |
申请人 |
CALANDRA FRANK;EATON JACK R.;STANKUS JOHN C.;STEWART EUGENE H.;BRANDON DEMREY G. |
发明人 |
CALANDRA FRANK;EATON JACK R.;STANKUS JOHN C.;STEWART EUGENE H.;BRANDON DEMREY G. |
分类号 |
B21D35/00;E21D11/15;E21D17/00;E21D17/01;E21D21/00;(IPC1-7):E02D3/02 |
主分类号 |
B21D35/00 |
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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