(19)

(11)

EP 0 839 099 A1

(12)

(43) Date of publication: 06.05.1998 Bulletin 1998/19 (21) Application number: 96922698.0 (22) Date of filing: 17.07.1996

(51) International Patent Classification (IPC):  B61F 5/ 22( . ) B60L 5/ 19( . ) (86) International application number: PCT/AU1996/000450 (87) International publication number: WO 1997/003858 (06.02.1997 Gazette 1997/07)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.07.1995 AU 1995PN04267 (71) Applicant: Walkers Limited Maryborough, QLD 4650 (AU)	(72) Inventor: JIRASEK, Jaroslav, Constantin Maryborough, QLD 4650 (AU) (74) Representative: Kemp, Paul Geoffrey  Batchellor, Kirk & Co., 2 Pear Tree Court, Farringdon Road London EC1R 0DS London EC1R 0DS (GB)