(19)

(11)

EP 0 174 303 A1

(12)

(43) Date of publication: 19.03.1986 Bulletin 1986/12 (21) Application number: 84901116.0 (22) Date of filing: 29.02.1984

(51) International Patent Classification (IPC):  A01B 21/ 04( . ) A01B 33/ 10( . ) A01B 33/ 02( . ) (86) International application number: PCT/SE1984/000072 (87) International publication number: WO 1985/003840 (12.09.1985 Gazette 1985/20)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL (71) Applicant: PETTERSSON, Stig S-825 00 Iggesund (SE)	(72) Inventor: PETTERSSON, Stig S-825 00 Iggesund (SE)