(19)

(11)

EP 0 380 502 A1

(12)

(43) Date of publication: 08.08.1990 Bulletin 1990/32 (21) Application number: 88907150.0 (22) Date of filing: 27.07.1988

(51) International Patent Classification (IPC):  F25C 1/ 14( . ) F28F 5/ 02( . ) (86) International application number: PCT/AU1988/000268 (87) International publication number: WO 1989/001120 (09.02.1989 Gazette 1989/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.07.1987 AU 19870003458 (71) Applicant: WILDRIDGE & SINCLAIR ENGINEERING PTY. LTD. Eagle Farm, QLD 4007 (AU)	(72) Inventors: LYON, Douglas, James Yeronga, QLD 4104 (AU) JENSEN, Stefan, Soby Wavel Heights, QLD 4012 (AU) CAGE, Jeffrey, Bruce Tarragindi, QLD 4121 (AU) NIBLOCK, Robert, Reid Cooparoo, QLD 8994 (AU) (74) Representative: Bayliss, Geoffrey Cyril, et al  BOULT, WADE & TENNANT 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)