(19)

(11)

EP 1 068 476 A1

(12)

(43) Date of publication: 17.01.2001 Bulletin 2001/03 (21) Application number: 99921339.0 (22) Date of filing: 06.04.1999

(51) International Patent Classification (IPC)7: F24F 3/14, F24F 3/147, F24F 5/00 (86) International application number: PCT/SE9900/565 (87) International publication number: WO 9951/918 (14.10.1999 Gazette 1999/41)

(84) Designated Contracting States: DE FI FR IT (30) Priority: 03.04.1998 SE 9801215 (71) Applicant: ABB FLÄKT AB S-120 86 Stockholm (SE)	(72) Inventor: GÖTMALM, Örjan S-429 30 Kullavik (SE) (74) Representative: Dahlstrand, Björn et al Asea Brown Boveri AB,Patent 721 78 Västeras 721 78 Västeras (SE)