(19)

(11)

EP 2 004 956 A1

(12)

(43) Date of publication: 24.12.2008 Bulletin 2008/52 (21) Application number: 07701087.4 (22) Date of filing: 15.01.2007

(51) International Patent Classification (IPC):  E21D 9/04(2006.01) (86) International application number: PCT/PT2007/000003 (87) International publication number: WO 2007/111520 (04.10.2007 Gazette 2007/40)

(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: 28.03.2006 PT 10342106 (71) Applicant: Silvino Pompeu, Santos 1600-419 Lisboa (PT)	(72) Inventor: Silvino Pompeu, Santos 1600-419 Lisboa (PT)