Device in impact machines

E - Fixed Constructions – 21 – B

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E21B 6/00 (2006.01) B25D 17/08 (2006.01) B25D 17/24 (2006.01) E21B 7/20 (2006.01)

Patent

CA 2009378

Device in impact machines. The device comprises a first chamber (5) which is connected to an accmulator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to damp the recoil from the set of rods.

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