(19)

(11)

EP 0 539 483 A1

(12)

(43) Date of publication: 05.05.1993 Bulletin 1993/18 (21) Application number: 91913603.0 (22) Date of filing: 19.07.1991

(51) International Patent Classification (IPC):  E03D 1/ 14( . ) (86) International application number: PCT/EP1991/001374 (87) International publication number: WO 1992/001842 (06.02.1992 Gazette 1992/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 19.07.1990 EP 19900201985 (71) Applicants: Veldhoven, Antonius Franciscus NL-2523 HD Den Haag (NL) Veldhoven, Edward NL-2541 AK Den Haag (NL)	(72) Inventors: Veldhoven, Antonius Franciscus NL-2523 HD Den Haag (NL) Veldhoven, Edward NL-2541 AK Den Haag (NL) (74) Representative: Barendregt, Frank, Drs.  van Exter Polak & Charlouis B.V., P.O. Box 3241 NL-2280 GE Rijswijk NL-2280 GE Rijswijk (NL)