E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) E21B 10/00 (2006.01) E21B 17/042 (2006.01)
Patent
CA 2665345
A drilling tool (10) incorporating first and second ends, a shaft (13, 90) extending between the ends. The first end has a drill bit (15) to penetrate rock. The drill bit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means (82, 83) that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt (10), a drill bit (15), drill shaft (13,90) and shaft coupling (94), an anchoring device (23), and an end coupling (95) per se.
L'invention concerne un outil à percer (10) comportant une première et une seconde extrémité, un arbre (13, 90) s'étendant entre les extrémités. La première extrémité possède un trépan (15) pour pénétrer dans la roche. Ledit trépan et l'arbre possèdent des filets complémentaires. Le trépan et l'arbre comprennent un moyen d'arrêt de rotation correspondant (82, 83) qui assure que le trépan demeure mobile pendant le perçage dans une première direction. L'invention concerne en outre un boulon d'ancrage autoperceur (10), un trépan (15), un arbre de perçage (13, 90) et un couplage d'arbre (94), un dispositif d'ancrage (23), et un couplage d'extrémité (95) en tant que tel.
Horsch John
Kenny Matthew
Weaver Steven
Webb Darren
Gowling Lafleur Henderson Llp
Sandvik Intellectual Property Ab
LandOfFree
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