(19)

(11)

EP 0 815 001 A1

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 96909401.0 (22) Date of filing: 29.03.1996

(51) International Patent Classification (IPC):  B63B 11/ 02( . ) B63B 43/ 04( . ) B63B 43/ 00( . ) (86) International application number: PCT/NO1996/000071 (87) International publication number: WO 1996/030251 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: BE DE DK ES FI FR GB GR IE IT NL SE (30) Priority: 31.03.1995 NO 19950001249 (71) Applicant: NORSK HYDRO a.s. 0240 Oslo (NO)	(72) Inventors: OLSEN, Björn, Ragnar N-3213 Sandefjord (NO) RUI, Svein, Albert N-3222 Sandefjord (NO) VALNUMSEN, Harald, Arvid N-4262 Avaldsnes (NO) SCHIERNING, Tom N-1400 Ski (NO) (74) Representative: Patentanwälte Leinweber & Zimmermann  Rosental 7 80331 München 80331 München (DE)