(19)

(11)

EP 0 840 826 A1

(12)

(43) Date of publication: 13.05.1998 Bulletin 1998/20 (21) Application number: 97903707.0 (22) Date of filing: 14.02.1997

(51) International Patent Classification (IPC):  E01C 5/ 00( . ) (86) International application number: PCT/SE1997/000240 (87) International publication number: WO 1997/030227 (21.08.1997 Gazette 1997/36)

(84) Designated Contracting States: AT BE CH DE ES FI FR GB GR IE IT LI LU MC NL PT (30) Priority: 16.02.1996 SE 19960000583 (71) Applicant: Patentsten International AB 116 23 Stockholm (SE)	(72) Inventor: TROJMAR, Rolf, H., S. S-116 23 Stockholm (SE) (74) Representative: Rosenquist, Per Olof, et al  Bergenstrahle & Lindvall AB, P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)