(19)

(11)

EP 0 611 430 A1

(12)

(43) Date of publication: 24.08.1994 Bulletin 1994/34 (21) Application number: 92920754.0 (22) Date of filing: 02.10.1992

(51) International Patent Classification (IPC):  F16K 1/ 24( . ) (86) International application number: PCT/AU1992/000530 (87) International publication number: WO 1993/007408 (15.04.1993 Gazette 1993/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 02.10.1991 AU 19910008679 (71) Applicant: CHAPMAN, John Edward Kingston, TAS 7050 (AU)	(72) Inventor: CHAPMAN, John Edward Kingston, TAS 7050 (AU) (74) Representative: Harris, Ian Richard  c/o D. Young & Co., 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)