(19)

(11)

EP 0 817 890 A1

(12)

(43) Date of publication: 14.01.1998 Bulletin 1998/03 (21) Application number: 96902178.0 (22) Date of filing: 19.02.1996

(51) International Patent Classification (IPC):  E01F 9/ 017( . ) (86) International application number: PCT/AU1996/000082 (87) International publication number: WO 1996/026322 (29.08.1996 Gazette 1996/39)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.02.1995 AU 1995PN01215 (71) Applicant: Hotchkin, Darren John Warragul VIC 3820 (AU)	(72) Inventor: Hotchkin, Darren John Warragul VIC 3820 (AU) (74) Representative: Casey, Lindsay Joseph, et al  F. R. Kelly & Co. 27 Clyde Road Ballsbridge Dublin 4 Dublin 4 (IE)