(19)

(11)

EP 2 547 866 A1

(12)

(43) Date of publication: 23.01.2013 Bulletin 2013/04 (21) Application number: 10848095.5 (22) Date of filing: 15.03.2010

(51) International Patent Classification (IPC):  E21D 9/08(2006.01) (86) International application number: PCT/US2010/027302 (87) International publication number: WO 2011/115610 (22.09.2011 Gazette 2011/38)

(84) Designated Contracting States: 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 SE SI SK SM TR (71) Applicant: Vermeer Manufacturing Company Pella, IA 50219-0200 (US)	(72) Inventors: HOELTING, Keith, Allen Dallas IA 50062 (US) SALINS, Andis Footscray Victoria 3011 (AU) HARRISON, Stuart Clyde Victoria 3978 (AU) (74) Representative: Fioravanti, Corrado et al Jacobacci & Partners S.p.A. Corso Emilia 8 10152 Torino 10152 Torino (IT)