(19)

(11)

EP 1 756 384 A2

(12)

(43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 05749348.8 (22) Date of filing: 22.04.2005

(51) International Patent Classification (IPC):  E04H 17/00(2006.01) (86) International application number: PCT/US2005/014050 (87) International publication number: WO 2006/001895 (05.01.2006 Gazette 2006/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR LV MK YU (30) Priority: 14.06.2004 US 866885 (71) Applicant: Kenton, Gregory S. Chanhassen, MN 55317 (US)	(72) Inventor: Kenton, Gregory S. Chanhassen, MN 55317 (US) (74) Representative: Browne, Robin Forsythe  Leaman Browne 5 South Parade Leeds, LS1 5QX Leeds, LS1 5QX (GB)