(19)

(11)

EP 0 916 052 A1

(12)

(43) Date of publication: 19.05.1999 Bulletin 1999/20 (21) Application number: 97932663.0 (22) Date of filing: 05.08.1997

(51) International Patent Classification (IPC):  F16L 3/ 11( . ) (86) International application number: PCT/AU1997/000497 (87) International publication number: WO 1998/005895 (12.02.1998 Gazette 1998/06)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.08.1996 AU 1996PO01441 23.09.1996 AU 1996PO02467 (71) Applicant: Abey Australia Pty. Ltd Airport West, VIC 3042 (AU)	(72) Inventor: ANDERSON, Geoffrey Airport West, VIC 3042 (AU) (74) Representative: Harvey, David Gareth, et al  Graham Watt & Co. Riverhead Sevenoaks Kent TN13 2BN Sevenoaks Kent TN13 2BN (GB)