(19)

(11)

EP 2 291 587 A1

(12)

(43) Date of publication: 09.03.2011 Bulletin 2011/10 (21) Application number: 09750154.8 (22) Date of filing: 14.05.2009

(51) International Patent Classification (IPC):  F15B 11/22(2006.01) (86) International application number: PCT/IB2009/005592 (87) International publication number: WO 2009/141697 (26.11.2009 Gazette 2009/48)

(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: 20.05.2008 GB 0809112 (71) Applicant: Valtra Oy Ab 44200 Suolahti (FI)	(72) Inventor: MAKKONEN, Eero, Johannes FIN-40800 Vaajokoski (FI)