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(11)

EP 1 668 194 A2

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(88) Date of publication A3: 28.07.2005 (43) Date of publication: 14.06.2006 Bulletin 2006/24 (21) Application number: 04794069.7 (22) Date of filing: 04.10.2004

(51) International Patent Classification (IPC):  E02F 3/96(1968.09) E02F 9/12(1968.09) E02F 3/38(1968.09) E02F 9/16(1968.09) E02F 3/34(1968.09) (86) International application number: PCT/US2004/032584 (87) International publication number: WO 2005/035882 (21.04.2005 Gazette 2005/16)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.10.2003 US 508339 P (71) Applicants: THE CHARLES MACHINE WORKS INC Perry, Oklahoma 73077-0066 (US) Sewell, Cody L. Perry, OK 73077 (US) Lumbers, Michael T. Perry, OK 73077 (US) Mullins, H. Stanley Perry, OK 73077 (US) Self, Kelvin P. Stillwater, OK 74075 (US)	(72) Inventors: SEWELL, Cody, L. Perry, OK 73077 (US) LUMBERS, Michael, T. Perry, OK 73077 (US) MULLINS, H., Stanley Perry, OK 73077 (US) SELF, Kelvin, P. Stillwater, OK 74075 (US) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)