(19)

(11)

EP 0 694 150 A1

(12)

(43) Date of publication: 31.01.1996 Bulletin 1996/05 (21) Application number: 94912565.0 (22) Date of filing: 22.04.1994

(51) International Patent Classification (IPC):  F24F 3/ 044( . ) (86) International application number: PCT/FI1994/000154 (87) International publication number: WO 1994/025804 (10.11.1994 Gazette 1994/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 23.04.1993 FI 19930001848 (71) Applicant: ABB FLÄKT OY SF-00620 Helsinki (FI)	(72) Inventors: KANNINEN, Seppo, Kalevi FIN-02230 Espoo (FI) LESKINEN, Seppo, Juhani FIN-01120 Västerskog (FI) ROLIN, Ingmar, Erik FIN-02730 Espoo (FI) (74) Representative: Füchsle, Klaus, Dipl.-Ing., et al  Hoffmann, Eitle & Partner, Patentanwälte, Arabellastrasse 4 D-81925 München D-81925 München (DE)