(19)

(11)

EP 1 117 877 A1

(12)

(43) Date of publication: 25.07.2001 Bulletin 2001/30 (21) Application number: 99945753.4 (22) Date of filing: 03.09.1999

(51) International Patent Classification (IPC)7: E03B 7/07, E04H 4/12, E04H 4/14, F16L 25/00, F16L 27/08, F16L 27/087, F16L 27/093 (86) International application number: PCT/AU9900/719 (87) International publication number: WO 0014/344 (16.03.2000 Gazette 2000/11)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 03.09.1998 AU PP568498 (71) Applicant: Chadson Engineering Pty. Ltd Balcatta, W.A. 6021 (AU)	(72) Inventors: HOBSON, Albert, Chadwick Attadale, W.A. 6156 (AU) HOBSON, Peter, Guy Subiaco, W.A. 6008 (AU) (74) Representative: Hano, Christian, Dipl.-Ing. et al v. Füner Ebbinghaus Finck HanoMariahilfplatz 2 & 3 81541 München 81541 München (DE)