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EP 2 839 170 A1

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(43) Date of publication: 25.02.2015 Bulletin 2015/09 (21) Application number: 12874402.6 (22) Date of filing: 17.04.2012

(51) International Patent Classification (IPC):  F15B 21/08(2006.01) F15B 13/02(2006.01) E02F 9/22(2006.01) (86) International application number: PCT/US2012/033949 (87) International publication number: WO 2013/158079 (24.10.2013 Gazette 2013/43)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME (71) Applicant: Wyoming Machinery Company Casper, Wyoming 82604 (US)	(72) Inventors: OATES, Richard, H. Casper, Wyoming 82609 (US) MUNSELL, Lukas M. Casper, Wyoming 82602 (US) STONE, Terry W. Casper, Wyoming 82604 (US) (74) Representative: Moffat, John Andrew  Avidity IP Broers Building Hauser Forum 21 JJ Thomson Ave Cambridge CB3 0FA Cambridge CB3 0FA (GB)