(19)

(11)

EP 0 577 628 A1

(12)

(43) Date of publication: 12.01.1994 Bulletin 1994/02 (21) Application number: 92906082.0 (22) Date of filing: 11.03.1992

(51) International Patent Classification (IPC):  F15B 13/ 043( . ) F15B 15/ 28( . ) F15B 15/ 20( . ) F15B 13/ 04( . ) (86) International application number: PCT/FI1992/000067 (87) International publication number: WO 1992/016756 (01.10.1992 Gazette 1992/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 13.03.1991 FI 19910001256 (71) Applicant: OY NESTEPAINE AB SF-00700 Helsinki (FI)	(72) Inventors: AHONOJA, Ilkka SF-00410 Helsinki (FI) LUOMARANTA, Markku SF-33710 Tampere (FI) (74) Representative: Denmark, James  Bailey, Walsh & Co. 5 York Place Leeds LS1 2SD Yorkshire Leeds LS1 2SD Yorkshire (GB)