(19)

(11)

EP 0 833 989 A1

(12)

(43) Date of publication: 08.04.1998 Bulletin 1998/15 (21) Application number: 96902491.0 (22) Date of filing: 11.01.1996

(51) International Patent Classification (IPC):  E01F 8/ 00( . ) E01F 15/ 04( . ) E02D 29/ 02( . ) E01F 15/ 00( . ) E01F 15/ 08( . ) (86) International application number: PCT/NL1996/000024 (87) International publication number: WO 1996/021774 (18.07.1996 Gazette 1996/33)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.01.1995 NL 19950000071 (71) Applicant: Bertels, Augustinus Wilhelmus Maria 6865 CL Doorwerth (NL)	(72) Inventor: Bertels, Augustinus Wilhelmus Maria 6865 CL Doorwerth (NL) (74) Representative: Schumann, Bernard Herman Johan, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 2517 GK Den Haag 2517 GK Den Haag (NL)