(19)

(11)

EP 2 398 969 A1

(12)

(43) Date of publication: 28.12.2011 Bulletin 2011/52 (21) Application number: 10712173.3 (22) Date of filing: 17.02.2010

(51) International Patent Classification (IPC):  E02D 29/02(2006.01) (86) International application number: PCT/IT2010/000056 (87) International publication number: WO 2010/095155 (26.08.2010 Gazette 2010/34)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 19.02.2009 IT FI20090031 (71) Applicant: Riusa.EU. S.R.L. 41049 Sassudo (MO) (IT)	(72) Inventors: ASTOLF, Luigi I-44100 Ferrara (IT) ANDRIGHETTI, Gabriele I-44100 Ferrara (IT) (74) Representative: Mannucci, Michele et al Ufficio Tecnico Ing.A. Mannucci Via della Scala 4 50123 Firenze 50123 Firenze (IT)