(19)

(11)

EP 0 093 721 A1

(12)

(43) Date of publication: 16.11.1983 Bulletin 1983/46 (21) Application number: 82901928.0 (22) Date of filing: 14.06.1982

(51) International Patent Classification (IPC):  A01B 13/ 00( . ) A01B 35/ 10( . ) (86) International application number: PCT/SE1982/000211 (87) International publication number: WO 1982/004376 (23.12.1982 Gazette 1982/30)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 15.06.1981 SE 19810003754 (71) Applicants: BRATE, Erik Ake Paul S-773 00 Fagersta (SE) BRATE, Hans Erik Paul S-773 00 Fagersta (SE)	(72) Inventors: BRATE, Erik Ake Paul S-773 00 Fagersta (SE) BRATE, Hans Erik Paul S-773 00 Fagersta (SE)