(19)

(11)

EP 2 061 682 A1

(12)

(43) Date of publication: 27.05.2009 Bulletin 2009/22 (21) Application number: 07808810.1 (22) Date of filing: 12.09.2007

(51) International Patent Classification (IPC):  B60T 8/17(2006.01) (86) International application number: PCT/SE2007/000797 (87) International publication number: WO 2008/033077 (20.03.2008 Gazette 2008/12)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 15.09.2006 SE 0601911 (71) Applicant: Atlas Copco Rock Drills AB 701 91 Örebro (SE)	(72) Inventors: GRAHN, Fredrik 716 92 Fjugesta (SE) FURUHOLM, Tobias 703 62 Örebro (SE) (74) Representative: Janson, Ronny  Ehrner & Delmar Patentbyrå AB Box 10316 100 55 Stockholm 100 55 Stockholm (SE)