(19)

(11)

EP 2 931 388 A1

(12)

(43) Date of publication: 21.10.2015 Bulletin 2015/43 (21) Application number: 13814190.8 (22) Date of filing: 11.12.2013

(51) International Patent Classification (IPC):  A63B 47/00(2006.01) B24B 11/10(2006.01) A63B 47/04(2006.01) (86) International application number: PCT/FI2013/051156 (87) International publication number: WO 2014/091080 (19.06.2014 Gazette 2014/25)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 14.12.2012 FI 20126311 (71) Applicant: Oy KWH Mirka Ab. 66850 Jeppo (FI)	(72) Inventor: HÖGLUND, Göran 66850 Jeppo (FI) (74) Representative: Kolster Oy Ab  Iso Roobertinkatu 23 PO Box 148 00121 Helsinki 00121 Helsinki (FI)