(19)

(11)

EP 1 786 989 A1

(12)

(43) Date of publication: 23.05.2007 Bulletin 2007/21 (21) Application number: 05771814.0 (22) Date of filing: 12.08.2005

(51) International Patent Classification (IPC):  E04B 1/68(2006.01) E01C 11/04(2006.01) E04F 15/14(2006.01) E01D 19/06(2006.01) (86) International application number: PCT/AU2005/001218 (87) International publication number: WO 2006/015451 (16.02.2006 Gazette 2006/07)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 13.08.2004 AU 2004904549 (71) Applicant: O'Brien, Timothy Charles Dee Why, New South Wales 2099 (AU)	(72) Inventor: O'Brien, Timothy Charles Dee Why, New South Wales 2099 (AU) (74) Representative: Urizar Anasagasti, José Antonio  Victor de la Sema 3-5 (parking) 28016 Madrid 28016 Madrid (ES)