(19)

(11)

EP 0 469 043 A1

(12)

(43) Date of publication: 05.02.1992 Bulletin 1992/06 (21) Application number: 90906734.0 (22) Date of filing: 19.04.1990

(51) International Patent Classification (IPC):  F24D 17/ 00( . ) F24H 1/ 20( . ) F24H 1/ 18( . ) F24H 9/ 12( . ) (86) International application number: PCT/AU1990/000159 (87) International publication number: WO 1990/012988 (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: 19.04.1989 AU 19890003790 18.12.1989 AU 19890007895 (60) Divisional application: 95111174.9 / 0679846 (71) Applicant: M.T. ASSOCIATES PROPRIETARY LTD. Moorabbin, VIC 3189 (AU)	(72) Inventor: TRIHEY, John, Massey Ringwood, VIC 3134 (AU) (74) Representative: Jones, Graham H.  Graham Jones & Company 77 Beaconsfield Road Blackheath London SE3 7LG London SE3 7LG (GB)