(19)

(11)

EP 0 894 199 A1

(12)

(43) Date of publication: 03.02.1999 Bulletin 1999/05 (21) Application number: 97921050.0 (22) Date of filing: 23.04.1997

(51) International Patent Classification (IPC):  F01D 7/ 00( . ) F04D 29/ 36( . ) F04D 29/ 26( . ) (86) International application number: PCT/SE1997/000683 (87) International publication number: WO 1997/041355 (06.11.1997 Gazette 1997/47)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT Designated Extension States: LT LV RO (30) Priority: 26.04.1996 SE 19960001589 (71) Applicant: ABB FLÄKT AKTIEBOLAG S-120 86 Stockholm (SE)	(72) Inventor: SÄTERDAL, Edgar S-360 40 Rottne (SE) (74) Representative: Jenkler, Malte, et al  Asea Brown Boveri AB Patent Stockholm Office 120 86 Stockholm 120 86 Stockholm (SE)