(19)

(11)

EP 0 991 901 A1

(12)

(43) Date of publication: 12.04.2000 Bulletin 2000/15 (21) Application number: 98928664.6 (22) Date of filing: 12.06.1998

(51) International Patent Classification (IPC)7: F24J 2/04, E04D 13/18 (86) International application number: PCT/NO9800/181 (87) International publication number: WO 9857/101 (17.12.1998 Gazette 1998/50)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 13.06.1997 NO 972738 (71) Applicant: Rostvik, Harald N. 4009 Stavanger (NO)	(72) Inventor: Rostvik, Harald N. 4009 Stavanger (NO) (74) Representative: Lindberg, Klas Valter Bo et al AWAPATENT AB,Södra Hamngatan 37-41,P.O. Box 11394 404 28 Göteborg 404 28 Göteborg (SE)