(19)

(11)

EP 0 542 798 A1

(12)

(43) Date of publication: 26.05.1993 Bulletin 1993/21 (21) Application number: 91913900.0 (22) Date of filing: 02.08.1991

(51) International Patent Classification (IPC):  G01F 1/ 86( . ) F17C 13/ 02( . ) G01N 9/ 24( . ) G01N 33/ 22( . ) B67D 7/ 16( . ) G01F 15/ 02( . ) G01N 27/ 22( . ) (86) International application number: PCT/AU1991/000341 (87) International publication number: WO 1992/002788 (20.02.1992 Gazette 1992/05)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 03.08.1990 AU 19900001554 (71) Applicant: LPG ENGINEERING PTY. LTD. Kilsyth, VIC 3137 (AU)	(72) Inventors: CLARK, John, Keith Kilsyth, VIC 3137 (AU) PAHL, Ronald Edwin Kilsyth, VIC 3137 (AU) (74) Representative: Jump, Timothy John Simon, et al  Venner Shipley & Co. 20 Little Britain London EC1A 7DH London EC1A 7DH (GB)