(19)

(11)

EP 0 473 639 A1

(12)

(43) Date of publication: 11.03.1992 Bulletin 1992/11 (21) Application number: 90907512.0 (22) Date of filing: 25.04.1990

(51) International Patent Classification (IPC):  A63C 19/ 02( . ) A63C 19/ 06( . ) (86) International application number: PCT/NL1990/000056 (87) International publication number: WO 1990/013340 (15.11.1990 Gazette 1990/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 28.04.1989 NL 19890001088 (71) Applicants: MULDER, Harmina NL-9561 TD Ter Apel (NL) NIJENHUIS, Jan NL-771 EX Hardenberg (NL)	(72) Inventor: NIJENHUIS, Jan NL-771 EX Hardenberg (NL) (74) Representative: Schumann, Bernard Herman Johan, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 NL-2517 GK Den Haag NL-2517 GK Den Haag (NL)