(19)

(11)

EP 0 634 984 A1

(12)

(43) Date of publication: 25.01.1995 Bulletin 1995/04 (21) Application number: 93908230.0 (22) Date of filing: 26.03.1993

(51) International Patent Classification (IPC):  B61D 17/ 04( . ) (86) International application number: PCT/SE1993/000255 (87) International publication number: WO 1993/019965 (14.10.1993 Gazette 1993/25)

(84) Designated Contracting States: CH DE DK FR GB LI (30) Priority: 30.03.1992 SE 19920000979 (71) Applicant: ASEA BROWN BOVERI AB S-721 83 Västeras (SE)	(72) Inventor: MARCUSSON, Lage S-723 55 Väster s (SE) (74) Representative: Boecker, Joachim, Dr.-Ing.  Adelonstrasse 58 D-65929 Frankfurt am Main D-65929 Frankfurt am Main (DE)