Rock bolt

Details Rock bolt Rock bolt

E - Fixed Constructions

21

D

E21D 21/00 (2006.01) E21D 20/00 (2006.01)

Patent

CA 2477346

An anchor device which includes a pipe (16), an elongate member (18) which is partly inside the pipe and which has an end (20) which protrudes from the pipe (16), and a restraining component (22) which is engaged with the protruding end (20), and wherein the pipe (16) and elongate member (18) are shaped with a plurality of formations, along their respective lengths, so that the elongate member (16) can only be withdrawn from the tubular member by deforming the elongate member (18).

L'invention concerne un dispositif d'ancrage comprenant un tuyau (16), un ~l~ment allong~ (18) partiellement plac~ ~ l'int~rieur dudit tuyau et poss~dant une extr~mit~ (20) faisant saillie ~ partir de ce tuyau (16), et un composant de retenue (22) qui coop­re avec l'extr~mit~ (20) en saillie. Ledit tuyau (16) et l'~l~ment allong~ (18) sont mis en forme au moyen d'une pluralit~ de formations sur leur longueurs respectives, de sorte que ledit ~l~ment allong~ (16) peut Útre retir~ de l'~l~ment tubulaire uniquement par d~formation dudit ~l~ment allong~ (18).

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