(19)

(11)

EP 2 318 604 A1

(12)

(43) Date of publication: 11.05.2011 Bulletin 2011/19 (21) Application number: 09803547.0 (22) Date of filing: 29.07.2009

(51) International Patent Classification (IPC):  E04B 1/74(2006.01) (86) International application number: PCT/US2009/052119 (87) International publication number: WO 2010/014721 (04.02.2010 Gazette 2010/05)

(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 Designated Extension States: AL BA RS (30) Priority: 29.07.2008 US 84450 P 29.07.2009 US 511387 (71) Applicant: Mitchell, John R. Wayland, IA 52654 (US)	(72) Inventor: Mitchell, John R. Wayland, IA 52654 (US) (74) Representative: Johnson, Yvonne Catherine  Barker Brettell LLP 100 Hagley Road Edgbaston GB-Birmingham B16 8QQ GB-Birmingham B16 8QQ (GB)