(19)

(11)

EP 2 209 689 A1

(12)

(43) Date of publication: 28.07.2010 Bulletin 2010/30 (21) Application number: 08837531.6 (22) Date of filing: 10.10.2008

(51) International Patent Classification (IPC):  B61B 13/04(2006.01) B61D 17/02(2006.01) (86) International application number: PCT/US2008/079492 (87) International publication number: WO 2009/049137 (16.04.2009 Gazette 2009/16)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 10.10.2007 US 978968 P 09.10.2008 US 248763 (71) Applicant: The Texas A&M University System College Station, TX 77843-3369 (US)	(72) Inventor: ROOP, Stephen, S. College Station TX 77840 (US) (74) Representative: Lawrence, John  Barker Brettell LLP 100 Hagley Road Edgbaston Birmingham, West Midlands B16 8QQ Birmingham, West Midlands B16 8QQ (GB)