E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 17/01 (2006.01) B21D 35/00 (2006.01) E21D 17/10 (2006.01) E21D 21/00 (2006.01)
Patent
CA 2431351
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.
Brandon Demery
Calandra Frank Jr.
Eaton Jack R.
Stankus John C.
Stewart Eugene H.
Dimock Stratton Llp
Jennmar Corporation
LandOfFree
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