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 connecte d by a substantially linear surface member disposed between the two rib members, two or more concave ribs with a substantially linear surface member disposed betwee n 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 ma y 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. |
申请公布号 |
CA2431351(C) |
申请公布日期 |
2008.01.22 |
申请号 |
CA20032431351 |
申请日期 |
2003.06.06 |
申请人 |
JENNMAR CORPORATION |
发明人 |
STEWART, EUGENE H.;BRANDON, DEMERY;CALANDRA, FRANK JR.;STANKUS, JOHN C.;EATON, JACK R. |
分类号 |
E21D17/01;B21D35/00;E21D11/15;E21D17/00;E21D17/10;E21D21/00 |
主分类号 |
E21D17/01 |
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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