E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/44
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.
Andersson Kurt Holger
Rodert Jorgen Alf Robert
Atlas Copco Construction And Mining Technique Ab
Atlas Copco Mct Ab
Fetherstonhaugh & Co.
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