(19)

(11)

EP 2 118 376 A1

(12)

(43) Date of publication: 18.11.2009 Bulletin 2009/47 (21) Application number: 07856549.6 (22) Date of filing: 11.12.2007

(51) International Patent Classification (IPC):  E01D 19/06(2006.01) (86) International application number: PCT/EP2007/010799 (87) International publication number: WO 2008/071386 (19.06.2008 Gazette 2008/25)

(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 MT NL PL PT RO SE SI SK TR (30) Priority: 13.12.2006 US 874759 P (71) Applicant: Construction Research and Technology GmbH 83308 Trostberg (DE)	(72) Inventor: BRADFORD, Paul West Falls, NY 14170 (US)