(19)

(11)

EP 0 617 694 A1

(12)

(43) Date of publication: 05.10.1994 Bulletin 1994/40 (21) Application number: 93900125.0 (22) Date of filing: 16.12.1992

(51) International Patent Classification (IPC):  B66C 23/ 42( . ) B66C 23/ 44( . ) (86) International application number: PCT/AU1992/000666 (87) International publication number: WO 1993/012029 (24.06.1993 Gazette 1993/15)

(84) Designated Contracting States: DE GB (30) Priority: 17.12.1991 AU 19910000049 (71) Applicant: THORBY, Donald Frederick Binnaway, NSW 2395 (AU)	(72) Inventor: THORBY, Donald Frederick Binnaway, NSW 2395 (AU) (74) Representative: Sanderson, Michael John, et al  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)