(19)

(11)

EP 0 557 393 A1

(12)

(43) Date of publication: 01.09.1993 Bulletin 1993/35 (21) Application number: 91920497.0 (22) Date of filing: 11.11.1991

(51) International Patent Classification (IPC):  A01B 33/ 00( . ) A01B 45/ 02( . ) F16H 21/ 40( . ) A01B 11/ 00( . ) A01B 45/ 04( . ) (86) International application number: PCT/AU1991/000513 (87) International publication number: WO 1992/008913 (29.05.1992 Gazette 1992/12)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 09.11.1990 AU 19900003264 15.11.1990 AU 19900003370 (71) Applicant: GREENCARE PTY. LIMITED Caringbah, NSW 2229 (AU)	(72) Inventor: LIVINGSTONE, David, John Silvania Waters, NSW 2224 (AU) (74) Representative: Bridge-Butler, Alan James  G.F. Redfern & Co. Redfern House 149/151 Tarring Road Worthing, West Sussex BN11 4HE Worthing, West Sussex BN11 4HE (GB)