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(11)

EP 2 831 353 A1

(12)

(43) Date of publication: 04.02.2015 Bulletin 2015/06 (21) Application number: 13769034.3 (22) Date of filing: 26.03.2013

(51) International Patent Classification (IPC):  E04H 9/02(2006.01) E04G 23/02(2006.01) E04B 1/98(2006.01) (86) International application number: PCT/US2013/033936 (87) International publication number: WO 2013/148725 (03.10.2013 Gazette 2013/40)

(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 Designated Extension States: BA ME (30) Priority: 26.03.2012 US 201261685793 P 13.09.2012 US 201213613441 17.09.2012 WO PCT/US2012/055809 (71) Applicant: Sr Systems, LLC Tuscaloosa, Alabama 35406 (US)	(72) Inventors: ZIMMERMAN, Steven Linden, Alabama 36748 (US) WALWORTH, Van T. Lebanon, Tennessee 37087 (US) DRUMMOND, Scott Tuscaloosa, Alabama 35406 (US) (74) Representative: Schaumburg, Thoenes, Thurn, Landskron, Eckert  Postfach 86 07 48 81634 München 81634 München (DE)