(19)

(11)

EP 0 954 641 A1

(12)

(43) Date of publication: 10.11.1999 Bulletin 1999/45 (21) Application number: 97929025.0 (22) Date of filing: 09.07.1997

(51) International Patent Classification (IPC):  E01C 23/ 04( . ) (86) International application number: PCT/AU1997/000434 (87) International publication number: WO 1998/002615 (22.01.1998 Gazette 1998/03)

(84) Designated Contracting States: BE DE ES FR GB IE IT NL PT (30) Priority: 11.07.1996 AU 1996PO00971 (71) Applicant: Beyers, Leonard Francis Baulkham Hills, NSW 2153 (AU)	(72) Inventor: Beyers, Leonard Francis Baulkham Hills, NSW 2153 (AU) (74) Representative: Fiener, Josef  Postfach 12 49 87712 Mindelheim 87712 Mindelheim (DE)