(19)

(11)

EP 2 702 207 A1

(12)

(43) Date of publication: 05.03.2014 Bulletin 2014/10 (21) Application number: 11719504.0 (22) Date of filing: 26.04.2011

(51) International Patent Classification (IPC):  E01C 11/22(2006.01) (86) International application number: PCT/EP2011/056570 (87) International publication number: WO 2012/146271 (01.11.2012 Gazette 2012/44)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (71) Applicant: Econpro Limited St Helens, Merseyside WA11 8LY (GB)	(72) Inventor: SUTTON, Philip Thornton Hough Merseyside CH63 4JU (GB) (74) Representative: Walker, Ross Thomson  Forresters Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)