(19)

(11)

EP 0 023 495 A1

(12)

(43) Date of publication: 11.02.1981 Bulletin 1981/06 (21) Application number: 80900158.0 (22) Date of filing: 03.01.1980

(51) International Patent Classification (IPC):  E02F 3/ 40( . ) E02F 3/ 96( . ) (86) International application number: PCT/SE1980/000001 (87) International publication number: WO 1980/001393 (10.07.1980 Gazette 1980/15)

(84) Designated Contracting States: AT DE FR GB (30) Priority: 03.01.1979 SE 19790000040 (71) Applicant: SONERUDS, MASKIN AB S-824 01 Hudiksvall (SE)	(72) Inventor: ENGKVIST, Lars S-823 00 Kilafors (SE) (74) Representative: Forsheden, Jarl Ragnar  L.A. Groth & Co. AB Västmannagatan 43 S-113 25 Stockholm S-113 25 Stockholm (SE)