(19)

(11)

EP 1 012 408 A1

(12)

(43) Date of publication: 28.06.2000 Bulletin 2000/26 (21) Application number: 97935913.0 (22) Date of filing: 13.08.1997

(51) International Patent Classification (IPC)7: E02F 3/40 (86) International application number: PCT/NO9700/205 (87) International publication number: WO 9806/908 (19.02.1998 Gazette 1998/07)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.08.1996 NO 963375 (71) Applicant: Gjerstad Mek. Industri AS 4993 Sundebru (NO)	(72) Inventor: OVERLAND, William - (NO) (74) Representative: Johansson Webjörn, Ingmari et al L.A. Groth & Co KB Patentbyra,P.O. Box 6107 102 32 Stockholm 102 32 Stockholm (SE)