(19)

(11)

EP 2 588 689 A2

(12)

(88) Date of publication A3: 08.03.2012 (43) Date of publication: 08.05.2013 Bulletin 2013/19 (21) Application number: 11799962.3 (22) Date of filing: 29.06.2011

(51) International Patent Classification (IPC):  E04H 4/16(2006.01) (86) International application number: PCT/AU2011/000800 (87) International publication number: WO 2012/000031 (05.01.2012 Gazette 2012/01)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 29.06.2010 AU 2010902875 (71) Applicant: Poolrite Research Pty Ltd Mt Gravatt, Queensland 4122 (AU)	(72) Inventor: PALMER, Ross, Leslie Mt Gravatt, Queensland 4122 (AU) (74) Representative: Hutter, Jacobus Johannes  Nederlandsch Octrooibureau J.W. Frisolaan 13 2517 JS The Hague 2517 JS The Hague (NL)