(19)
(11) EP 2 379 283 A1

(12)

(43) Date of publication:
26.10.2011 Bulletin 2011/43

(21) Application number: 09838481.1

(22) Date of filing: 04.12.2009
(51) International Patent Classification (IPC): 
B25D 17/24(2006.01)
E21B 1/38(2006.01)
 B25D 9/14(2006.01)
(86) International application number:
PCT/SE2009/000508
(87) International publication number:
WO 2010/082871 (22.07.2010 Gazette 2010/29)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(30) Priority: 16.01.2009 SE 0900045

(71) Applicant: Atlas Copco Rock Drills AB
701 91 Örebro (SE)

(72) Inventors:
  • JONSSON, Erik
    703 63 Örebro (SE)
  • LARSSON, Fredrik
    S-584 32 Linköping (SE)
  • GUSTAVSSON, Daniel
    S-614 33 Söderköping (SE)
  • WALLIN, Jakob
    S-112 27 Stockholm (SE)

(74) Representative: Janson, Ronny 
Ehrner & Delmar Patentbyra AB P.O. Box 10316
100 55 Stockholm
100 55 Stockholm (SE)

   


(54) DAMPING DEVICE FOR PERCUSSION DEVICE, PERCUSSION DEVICE AND DRILLING MACHINE