E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 20/00 (2006.01)
Patent
CA 2599522
A rock bolt and a method of installing a rock bolt in a borehole (3) of a rock formation. The rock bolt including an elongate shank (1) and an expansion assemby (2) located at the distal end of the shank. The expansion assembly being expandable to lock the rock bolt in a borehole upon relative forward rotation of the rock bolt. The rock bolt further including stop means (4) to lock the expansion assembly with respect to the rock bolt for conjoined rotation upon a reverse rotation of the rock bolt.
Vis d'ancrage et méthode de mise en place dans un trou de forage (3) percé dans une formation rocheuse. La vis d'ancrage comprend une tige longue (1) et une coquille d'expansion située à l'extrémité distale de la tige. En se dilatant, la coquille d'expansion bloque la vis dans le trou de forage lorque cette dernière est vissée. La vis d'ancrage comprend également un dispositif de butée (4) qui solidarise la coquille d'expansion et la vis d'ancrage. La vis d'ancrage comprend également un dispositif de butée (4) pour retrait conjoint de la coquille d'expansion et de ladite vis.
Dimock Stratton Llp
Jennmar Corporation
LandOfFree
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