(19)

(11)

EP 0 231 252 A1

(12)

(43) Date of publication: 12.08.1987 Bulletin 1987/33 (21) Application number: 86904415.0 (22) Date of filing: 24.07.1986

(51) International Patent Classification (IPC):  E02F 3/ 18( . ) E02F 5/ 28( . ) E02F 5/ 08( . ) E02F 5/ 02( . ) (86) International application number: PCT/NL1986/000020 (87) International publication number: WO 1987/000568 (29.01.1987 Gazette 1987/03)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 25.07.1985 NL 19850002124 (71) Applicant: KONIJN, Nicolass Gerardus NL-1633 JB Avenhorn (NL)	(72) Inventor: KONIJN, Nicolass Gerardus NL-1633 JB Avenhorn (NL) (74) Representative: de Vries, Johannes Hendrik Fokke, et al  Octrooibureau Los en Stigter B.V. P.O. Box 20052 NL-1000 HB Amsterdam NL-1000 HB Amsterdam (NL)