E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) E21D 20/02 (2006.01)
Patent
CA 2439397
A mine roof bolt assembly for use in a bolt hole includes a rebar having an externally threaded end and a nut or other suitable fastener which is configured to threadedly engage the threaded end of the rebar. Bores formed through the nut and rebar are configured for alignment when the nut is positioned on the rebar in a first or initial position. A pair of shear pins are inserted so as to locate partially within segments of the bore formed in the nut, as well as within the bore formed through the rebar. The pins have a sizing selected so as to maintain a spacing between the innermost pin ends which are proximate to each other. The spacing in between the inner ends of the pins is selected so that when the fastener is rotated relative to the rebar under a predetermined minimum torque, the pins fracture or shear at the junction between the nut and the rebar. The pin fragments within the rebar thus may move inwardly into the spacing towards each other so as not to interfere or otherwise wedge between the bolt and nut threads, as the nut is threaded onto the bolt.
Mansour Mining Inc.
Riches Mckenzie & Herbert Llp
LandOfFree
Mine roof bolt assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mine roof bolt assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mine roof bolt assembly will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1351045