(19)

(11)

EP 2 550 720 A2

(12)

(43) Date of publication: 30.01.2013 Bulletin 2013/05 (21) Application number: 11715256.1 (22) Date of filing: 14.03.2011

(51) International Patent Classification (IPC):  H02K 1/22(2006.01) (86) International application number: PCT/FI2011/050217 (87) International publication number: WO 2011/117466 (29.09.2011 Gazette 2011/39)

(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 (30) Priority: 23.03.2010 FI 20105288 (71) Applicant: The Switch Drive Systems Oy 53850 Lappeenranta (FI)	(72) Inventor: SEPPÄNEN, Sakari FI-04430 Järvenpää (FI) (74) Representative: Väänänen, Janne Kalervo  Berggren OY AB P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)