(19)

(11)

EP 0 561 921 A1

(12)

(43) Date of publication: 29.09.1993 Bulletin 1993/39 (21) Application number: 92900883.0 (22) Date of filing: 10.12.1991

(51) International Patent Classification (IPC):  B66F 9/ 12( . ) (86) International application number: PCT/AU1991/000569 (87) International publication number: WO 1992/010423 (25.06.1992 Gazette 1992/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 10.12.1990 AU 19900003806 (71) Applicant: PANAMA ENGINEERING PTY LIMITED Wetherill Park, NSW 2164 (AU)	(72) Inventor: SCOTTO, Carl, Albert Lidcombe, NSW 2141 (AU) (74) Representative: Cummings, Sean Patrick, et al  David Keltie Associates Audrey House Ely Place London EC1N 6SN London EC1N 6SN (GB)