(19)

(11)

EP 2 331 812 A1

(12)

(43) Date of publication: 15.06.2011 Bulletin 2011/24 (21) Application number: 09818846.9 (22) Date of filing: 29.09.2009

(51) International Patent Classification (IPC):  F03B 13/20(2006.01) (86) International application number: PCT/FI2009/050777 (87) International publication number: WO 2010/040894 (15.04.2010 Gazette 2010/15)

(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 Designated Extension States: AL BA RS (30) Priority: 10.10.2008 FI 20085954 (71) Applicant: Wello Oy 02380 Espoo (FI)	(72) Inventor: PAAKKINEN, Heikki FI-02380 Espoo (FI) (74) Representative: LEITZINGER OY  Tammasaarenkatu 1 00180 Helsinki 00180 Helsinki (FI)