(19)

(11)

EP 0 960 241 A1

(12)

(43) Date of publication: 01.12.1999 Bulletin 1999/48 (21) Application number: 98900871.0 (22) Date of filing: 19.01.1998

(51) International Patent Classification (IPC):  E01B 2/ 00( . ) E04H 12/ 22( . ) E02D 27/ 42( . ) (86) International application number: PCT/FI1998/000039 (87) International publication number: WO 1998/031877 (23.07.1998 Gazette 1998/29)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 17.01.1997 FI 19970000017U (71) Applicants: Jyrki Tarkkonen OY 02320 Espoo (FI) RAUTARUUKKI OY 90250 Oulu (FI)	(72) Inventor: TARKKONEN, Jyrki FIN-02320 Espoo (FI) (74) Representative: Eriksson, Svante Johan Christer, et al  Oy Jalo Ant-Wuorinen Ab Iso Roobertinkatu 4-6 A 00120 Helsinki 00120 Helsinki (FI)