B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 47/28 (2006.01) B23B 35/00 (2006.01) B23B 49/02 (2006.01) B25D 17/08 (2006.01) B28D 1/14 (2006.01) B28D 7/00 (2006.01)
Patent
CA 2674651
A seismic tool assembly for effecting a drill hole and enlarging a lowermost end thereof whereby an anchor can be set more securely therein. A drill bit is inserted through an opening in a stabilizer, which is positioned over a surface where the drill hole is to be made. The bit is placed into the drill hole, attaining a position at the lowermost end thereof. The lower end of the bit has a cutting portion having a cutting radius greater than that of the bit body whereby, when the bit is inserted fully into a lowermost end of the hole and rotated, the cutting portion enlarges the lowermost end of the hole, whereby flanged portions of an anchor will rest within the enlarged area, retaining the anchor in place. The stabilizer has a flanged portion extending into the hole, which provides a space between the bit and the stabilizer to permit limited tilting movement of the bit during drilling to enlarge a lowermost end of the hole, and for aiding in accurately inserting the bit into position.
Outil à chocs permettant de percer un trou et d'en élargir le fond de façon à pouvoir y fixer solidement un dispositif d'ancrage. Une mèche est insérée dans l'ouverture d'un stabilisateur, qui est placé sur la surface où le trou sera percé. La mèche est placée dans le trou de façon à atteindre le fond. L'extrémité inférieure de la mèche comporte une partie coupante dont le rayon de coupe est supérieur au diamètre de la mèche. Lorsque la mèche est entièrement insérée dans le trou et qu'elle tourne, la partie coupante élargit le fond du trou. Le rebord d'une fixation reposera dans la partie élargie et tiendra en place la fixation. Le stabilisateur comporte un rebord saillant qui se prolonge dans le trou de façon à former un espace entre la mèche et le stabilisateur et à limiter le mouvement latéral de la mèche pendant le perçage, ce qui permet d'agrandir le fond du trou et d'aider à placer la mèche avec précision.
Cousineau Robert
Na
LandOfFree
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