(19)

(11)

EP 0 500 523 A1

(12)

(43) Date of publication: 02.09.1992 Bulletin 1992/36 (21) Application number: 90903722.0 (22) Date of filing: 23.02.1990

(51) International Patent Classification (IPC):  A63B 9/ 00( . ) A63B 71/ 02( . ) (86) International application number: PCT/AU1990/000072 (87) International publication number: WO 1990/009814 (07.09.1990 Gazette 1990/21)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 24.02.1989 AU 19890002941 (71) Applicant: GLENWOOD SYSTEMS PTY.LTD. Vermont, VIC 3133 (AU)	(72) Inventors: SHOWERS, David, Field Malvern, VIC 3144 (AU) QUANTRELL, Barry, James Glen Waverley, VIC 3150 (AU) WEST, Christopher, William Hurstbridge, VIC 3099 (AU) WELSFORD, Colin, John Mooroolbark, VIC 3138 (AU) (74) Representative: Marsden, John Christopher  Frank B. Dehn & Co. Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)