(19)

(11)

EP 1 828 493 A2

(12)

(88) Date of publication A3: 29.03.2007 (43) Date of publication: 05.09.2007 Bulletin 2007/36 (21) Application number: 05853412.4 (22) Date of filing: 08.12.2005

(51) International Patent Classification (IPC):  E02F 5/08(2006.01) (86) International application number: PCT/US2005/044484 (87) International publication number: WO 2006/063166 (15.06.2006 Gazette 2006/24)

(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 LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 08.12.2004 US 634323 P (71) Applicant: Yoder, Shaun Wellman, IA 52356 (US)	(72) Inventor: HOLTMEIER, Jerry Washington, Iowa 52353 (US) (74) Representative: Powell, Timothy John et al Eric Potter Clarkson LLP Park View House 58 The Ropewalk Nottingham NG1 5DD Nottingham NG1 5DD (GB)