(19)

(11)

EP 1 668 185 A1

(12)

(43) Date of publication: 14.06.2006 Bulletin 2006/24 (21) Application number: 04770796.3 (22) Date of filing: 21.09.2004

(51) International Patent Classification (IPC):  E01C 23/14(1968.09) (86) International application number: PCT/IT2004/000514 (87) International publication number: WO 2005/031070 (07.04.2005 Gazette 2005/14)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 26.09.2003 IT PD20030227 (71) Applicant: Socotherm Italia S.p.A. 36100 Vicenza (IT)	(72) Inventor: FRACASSO, Giuseppe, c/o Socotherm Italia S.P.A. 36100 Vicenza (IT) (74) Representative: Gustorf, Gerhard  Patentanwalt, Bachstrasse 6 A 84036 Landshut 84036 Landshut (DE)