(19)

(11)

EP 0 934 477 A1

(12)

(43) Date of publication: 11.08.1999 Bulletin 1999/32 (21) Application number: 97910647.0 (22) Date of filing: 24.10.1997

(51) International Patent Classification (IPC):  F16H 1/ 28( . ) (86) International application number: PCT/NZ1997/000144 (87) International publication number: WO 1998/021504 (22.05.1998 Gazette 1998/20)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 08.11.1996 NZ 19960299720 (71) Applicant: Howick Engineering Limited Howick, Auckland (NZ)	(72) Inventors: COUBRAY, Bruce, Arthur Auckland (NZ) COUBRAY, Alan, Keith Auckland (NZ) (74) Representative: Beresford, Keith Denis Lewis, et al  BERESFORD & Co. 2-5 Warwick Court High Holborn London WC1R 5DJ London WC1R 5DJ (GB)