(19)
(11) EP 2 282 871 A1

(12)

(43) Date of publication:
16.02.2011 Bulletin 2011/07

(21) Application number: 09758603.6

(22) Date of filing: 02.06.2009
(51) International Patent Classification (IPC): 
B25D 9/26(2006.01)
E21B 4/14(2006.01)
 E21B 1/38(2006.01)
(86) International application number:
PCT/SE2009/000286
(87) International publication number:
WO 2009/148376 (10.12.2009 Gazette 2009/50)
(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 TR
Designated Extension States:
AL BA RS

(30) Priority: 05.06.2008 SE 0801326

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

(72) Inventors:
  • BIRATH, Peter
    S-719 31 Vintrosa (SE)
  • LORIN, Mikael
    S-703 75 Örebro (SE)
  • AWAD, Mattias
    S-702 12 Örebro (SE)

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

   


(54) DEVICE AND METHOD FOR SENSING A PARAMETER RELATED TO A POSITION OF A DISPLACEABLE ELEMENT IN A ROCK DRILL