(19)

(11)

EP 0 223 788 A1

(12)

(43) Date of publication: 03.06.1987 Bulletin 1987/23 (21) Application number: 86903127.0 (22) Date of filing: 06.05.1986

(51) International Patent Classification (IPC):  F01C 1/ 10( . ) F03C 1/ 08( . ) F03C 1/ 32( . ) F01B 13/ 06( . ) F03C 1/ 22( . ) F03C 2/ 08( . ) (86) International application number: PCT/AU1986/000126 (87) International publication number: WO 1986/006787 (20.11.1986 Gazette 1986/25)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.05.1985 AU 19850000477 (71) Applicant: TENNYSON HOLDINGS LTD. West Perth, WA 6005 (AU)	(72) Inventors: RIGBY, Robert, William Byford, W.A. 6201 (AU) BURNS, Alan, Robert Mosman Park, W.A. 6012 (AU) (74) Representative: Eyles, Christopher Thomas, et al  BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road London, EC1R 0DS London, EC1R 0DS (GB)