(19)

(11)

EP 2 552 271 A1

(12)

(43) Date of publication: 06.02.2013 Bulletin 2013/06 (21) Application number: 11706420.4 (22) Date of filing: 18.02.2011

(51) International Patent Classification (IPC):  A44B 11/25(2006.01) (86) International application number: PCT/US2011/025359 (87) International publication number: WO 2011/123196 (06.10.2011 Gazette 2011/40)

(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 (30) Priority: 31.03.2010 US 751232 (71) Applicant: D B Industries, Inc. Red Wing, MN 55066-5005 (US)	(72) Inventor: MILBRIGHT, Michael N. Red Wing MN 55066 (US) (74) Representative: Charlton, Peter John  Elkington and Fife LLP Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)