(19)

(11)

EP 1 017 907 A1

(12)

(43) Date of publication: 12.07.2000 Bulletin 2000/28 (21) Application number: 98944355.1 (22) Date of filing: 28.09.1998

(51) International Patent Classification (IPC)7: E01F 8/00, E01F 8/02 (86) International application number: PCT/NL9800/559 (87) International publication number: WO 9907/943 (18.02.1999 Gazette 1999/07)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 26.09.1997 NL 1007142 (71) Applicants: De Jong, Nicolaas Arie 2676 LC Maasdijk (NL) Van Kester, Cornelis Johannes 2544 NV Den Haag (NL)	(72) Inventors: De Jong, Nicolaas Arie 2676 LC Maasdijk (NL) Van Kester, Cornelis Johannes 2544 NV Den Haag (NL) (74) Representative: Jorritsma, Ruurd et al Nederlandsch OctrooibureauScheveningseweg 82P.O. Box 29720 2502 LS Den Haag 2502 LS Den Haag (NL)