(19)

(11)

EP 1 214 475 A1

(12)

(43) Date of publication: 19.06.2002 Bulletin 2002/25 (21) Application number: 99933314.9 (22) Date of filing: 20.05.1999

(51) International Patent Classification (IPC)7: E01F 9/00, B61L 29/24 (86) International application number: PCT/SE9900/857 (87) International publication number: WO 0071/817 (30.11.2000 Gazette 2000/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (71) Applicants: Eklund, Börje 184 34 Akersberga (SE) Persson, Hans-Erik 805 98 Gävle (SE)	(72) Inventors: Eklund, Börje 184 34 Akersberga (SE) Persson, Hans-Erik 805 98 Gävle (SE) (74) Representative: Olsson, Jan et al Bjerkéns Patentbyra KBP.O.Box 1274 801 37 Gävle 801 37 Gävle (SE)