(19)

(11)

EP 2 396 512 A2

(12)

(88) Date of publication A3: 12.05.2011 (43) Date of publication: 21.12.2011 Bulletin 2011/51 (21) Application number: 10709262.9 (22) Date of filing: 12.02.2010

(51) International Patent Classification (IPC):  E21D 11/00(2006.01) E21D 21/00(2006.01) (86) International application number: PCT/GB2010/050240 (87) International publication number: WO 2010/092405 (19.08.2010 Gazette 2010/33)

(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 (30) Priority: 12.02.2009 DE 102009008627 (71) Applicant: Minova International Limited Park Road, Holmewood Industrial Estate Chesterfield Derbyshire S42 5UY (GB)	(72) Inventor: WECHSLER, Josef CH-6203 Sempach Station (CH) (74) Representative: Peel, James Peter  Barker Brettell LLP 100 Hagley Road Edgbaston Birmingham B16 8QQ Edgbaston Birmingham B16 8QQ (GB)