Down-the-hole drill hammer.

Details Down-the-hole drill hammer. Down-the-hole drill hammer.

E - Fixed Constructions

21

B

E21B 4/06 (2006.01) E21B 4/20 (2006.01) E21B 17/046 (2006.01)

Patent

CA 2470227

The present invention relates to an arrangement pertaining to down-the-hole hammers in which a driver (7) is adapted to transfer torsion forces between a rotating outer tube (10) and a drill bit (1) of the hammer, wherein the outer tube (10) surrounds all of the driver (7).

L'invention concerne un agencement concernant des marteaux de fonds de trou, dans lesquels un dispositif d'entraînement (7) est conçu pour transférer des forces de torsion entre un tube extérieur rotatif (10) et l'outil de forage (1) d'un marteau, le tube extérieur (10) entourant tout le dispositif d'entraînement (7).

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