(19)

(11)

EP 0 434 723 A1

(12)

(43) Date of publication: 03.07.1991 Bulletin 1991/27 (21) Application number: 89910216.0 (22) Date of filing: 15.09.1989

(51) International Patent Classification (IPC):  G05D 7/ 00( . ) G05D 7/ 01( . ) (86) International application number: PCT/SE1989/000498 (87) International publication number: WO 1990/002988 (22.03.1990 Gazette 1990/07)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL (30) Priority: 16.09.1988 SE 19880003272 (71) Applicants: BRODEFORS, Lage S-411 33 Goteborg (SE) IRSTAM, Lars S-436 00 Askim (SE)	(72) Inventors: BRODEFORS, Lage S-411 33 Goteborg (SE) IRSTAM, Lars S-436 00 Askim (SE) (74) Representative: Barnieske, Hans Wolfgang  c/o H.W. Barnieske Patentbyra AB Turingegatan 26 P.O. Box 25 S-151 21 Södertälje 1 S-151 21 Södertälje 1 (SE)