(19)

(11)

EP 0 891 448 A1

(12)

(43) Date of publication: 20.01.1999 Bulletin 1999/03 (21) Application number: 97919799.0 (22) Date of filing: 03.03.1997

(51) International Patent Classification (IPC):  E01C 19/ 20( . ) (86) International application number: PCT/SE1997/000352 (87) International publication number: WO 1997/037083 (09.10.1997 Gazette 1997/43)

(84) Designated Contracting States: AT BE CH DE DK FI FR IT LI NL SE (30) Priority: 03.04.1996 SE 19960001285 (71) Applicant: CONTRANO NILS NORDIN S-737 34 Fagersta (SE)	(72) Inventor: NORDIN, Nils S-737 34 Fagersta (SE) (74) Representative: Bjerkén, Jarl Hakan, et al  Bjerkéns Patentbyra KB P.O.Box 1274 801 37 Gävle 801 37 Gävle (SE)