(19)

(11)

EP 0 408 624 A1

(12)

(43) Date of publication: 23.01.1991 Bulletin 1991/04 (21) Application number: 89903977.0 (22) Date of filing: 31.03.1989

(51) International Patent Classification (IPC):  A61G 1/ 044( . ) A61G 7/ 05( . ) (86) International application number: PCT/AU1989/000142 (87) International publication number: WO 1989/009039 (05.10.1989 Gazette 1989/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.03.1988 AU 19880007672 (71) Applicant: HEMCO INDUSTRIES PROPRIETARY LIMITED West Brunswick, VIC 3055 (AU)	(72) Inventor: HEMPHILL, Desmond, John Ballarat, VIC 3350 (AU) (74) Representative: Raynor, John  W.H. Beck, Greener & Co 7 Stone Buildings Lincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)