(19)

(11)

EP 1 812 663 A1

(12)

(43) Date of publication: 01.08.2007 Bulletin 2007/31 (21) Application number: 05731651.5 (22) Date of filing: 17.03.2005

(51) International Patent Classification (IPC):  E04C 5/02(2006.01) (86) International application number: PCT/BR2005/000050 (87) International publication number: WO 2006/005145 (19.01.2006 Gazette 2006/03)

(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 MC NL PL PT RO SE SI SK TR (30) Priority: 12.07.2004 BR 0403995 (71) Applicant: BMP Siderugia S/A Belo Horizonte, MG CEP-30130-915 (BR)	(72) Inventor: AMANUMA, Toshio Juiz de Fora, MG CEP-36016-470 (BR) (74) Representative: Lorente Berges, Ana  C/Félix Boix 3 - 7. C 28036 Madrid 28036 Madrid (ES)