E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) E21D 20/02 (2006.01)
Patent
CA 2576116
A rock bolt having a modified tip geometry for spreading grouting material along the bolt or rupturing a grouting material container, or both, and method of using such a rock bolt for substrate support.
Cotten Steven A.
Giraldo Luis B.
Raytheon Utd Incorporated
Ridout & Maybee Llp
LandOfFree
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