(19)

(11)

EP 0 217 949 A1

(12)

(43) Date of publication: 15.04.1987 Bulletin 1987/16 (21) Application number: 86903113.0 (22) Date of filing: 15.04.1986

(51) International Patent Classification (IPC):  F01B 9/ 06( . ) F02B 75/ 22( . ) F02B 75/ 18( . ) F02B 57/ 08( . ) F02B 75/ 02( . ) (86) International application number: PCT/AU1986/000098 (87) International publication number: WO 1986/006134 (23.10.1986 Gazette 1986/23)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 15.04.1985 AU 19850000171 (71) Applicant: TENNYSON HOLDINGS LTD. West Perth, WA 6005 (AU)	(72) Inventors: CHANDLER, Graeme, Alfred Morley, W.A. 6062 (AU) BURNS, Alan, Robert Mosman Park, W.A. 6012 (AU)