(19)

(11)

EP 0 065 972 A1

(12)

(43) Date of publication: 08.12.1982 Bulletin 1982/49 (21) Application number: 82900007.0 (22) Date of filing: 04.12.1981

(51) International Patent Classification (IPC):  F16K 5/ 18( . ) F16K 11/ 02( . ) F16K 7/ 18( . ) F16K 11/ 085( . ) (86) International application number: PCT/AU1981/000184 (87) International publication number: WO 1982/001924 (10.06.1982 Gazette 1982/15)

(84) Designated Contracting States: AT CH DE FR GB LI NL SE (30) Priority: 04.12.1980 AU 19800006762 (71) Applicant: DESIGN & TECHNOLOGY SERVICES PTY. LTD. Kilsyth, Vic. 3137 (AU)	(72) Inventor: MacLEOD, John Kenneth Croydon, Vic. 3136 (AU) (74) Representative: Gregory, Timothy Mark, et al  Urquhart-Dykes & Lord Midsummer House 411C Midsummer Boulevard Central Milton Keynes MK9 3BN Central Milton Keynes MK9 3BN (GB)