E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 15/14 (2006.01)
Patent
CA 2714191
A mine rib support for bracing a vertical mine rib disposed between a mine floor and a mine roof. The support includes an elongated upright and continuous telescopically expandable support having a preset curvature. The member is longitudinally expanded for engaging the mine floor and the mine roof under compression with the curvature facing towards the mine rib. A support plate is laterally extended from the support member into compression engagement with the mine rib, thereby prestressing the support for support of the mine rib.
Breedlove John J.
Denver Erik
Stiltner Herbert B.
Heintzmann Corporation
Marks & Clerk
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