(19)

(11)

EP 0 470 162 A1

(12)

(43) Date of publication: 12.02.1992 Bulletin 1992/07 (21) Application number: 90907255.0 (22) Date of filing: 24.04.1990

(51) International Patent Classification (IPC):  F16H 31/ 00( . ) (86) International application number: PCT/GB1990/000627 (87) International publication number: WO 1990/012969 (01.11.1990 Gazette 1990/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 25.04.1989 GB 19890009371 (71) Applicants: Barton, Gordon Page London SW7 (GB) Egan, Michael Joseph Wollongong, NSW 2515 (AU)	(72) Inventor: EGAN, Michael, Joseph Wollongong, NSW 2515 (AU) (74) Representative: Goodenough, Nigel  A.A. Thornton & Co. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)