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(11)

EP 2 002 062 A1

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(43) Date of publication: 17.12.2008 Bulletin 2008/51 (21) Application number: 07754235.5 (22) Date of filing: 27.03.2007

(51) International Patent Classification (IPC):  E02F 3/08(2006.01) (86) International application number: PCT/US2007/007683 (87) International publication number: WO 2007/126890 (08.11.2007 Gazette 2007/45)

(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 MT NL PL PT RO SE SI SK TR (30) Priority: 27.03.2006 US 743816 P (71) Applicant: THE CHARLES MACHINE WORKS INC Perry, Oklahoma 73077-0066 (US)	(72) Inventors: HAMBURGER, Jacob, A. Perry, OK 73077 (US) SEWELL, Cody, L. Perry, OK 73077 (US) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)