(19)

(11)

EP 1 481 190 A1

(12)

(43) Date of publication: 01.12.2004 Bulletin 2004/49 (21) Application number: 03706663.6 (22) Date of filing: 05.03.2003

(51) International Patent Classification (IPC)7: F16L 59/00 (86) International application number: PCT/FI2003/000165 (87) International publication number: WO 2003/074927 (12.09.2003 Gazette 2003/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 06.03.2002 FI 20020433 (71) Applicant: Fläkt Woods AB 55184 Jönköping (SE)	(72) Inventor: TUOMI, Jouni FIN-20300 Turku (FI) (74) Representative: Valkeiskangas, Tapio  Kolster Oy AB, Iso Roobertinkatu 23, P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)