(19)

(11)

EP 0 948 717 A1

(12)

(43) Date of publication: 13.10.1999 Bulletin 1999/41 (21) Application number: 97911264.0 (22) Date of filing: 06.11.1997

(51) International Patent Classification (IPC):  F04D 7/ 04( . ) F04D 29/ 66( . ) F04D 29/ 44( . ) (86) International application number: PCT/FI1997/000672 (87) International publication number: WO 1998/021480 (22.05.1998 Gazette 1998/20)

(84) Designated Contracting States: AT DE FR SE (30) Priority: 13.11.1996 FI 19960004551 (71) Applicant: Ahlström Pumput Oy 48601 Karhula (FI)	(72) Inventors: KUPIAINEN, Seppo FIN-48500 Karhula (FI) SAARI, Petri FIN-65200 Vaasa (FI) (74) Representative: HOFFMANN - EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)