(19)

(11)

EP 2 315 971 A1

(12)

(43) Date of publication: 04.05.2011 Bulletin 2011/18 (21) Application number: 08768404.9 (22) Date of filing: 13.06.2008

(51) International Patent Classification (IPC):  F23D 3/40(2006.01) (86) International application number: PCT/US2008/007361 (87) International publication number: WO 2009/151420 (17.12.2009 Gazette 2009/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: Worgas Inc. Bowling Green, Kentucky 42101 (US)	(72) Inventors: BERTHOLD, Gunther 74321 Bietigheim-Bissingen (DE) HILLIARD, Terry Glasgow Kentucky 42141 (US) JACOBS, James Bowling Green Kentucky 42101 (US) (74) Representative: Ström & Gulliksson AB  Box 4188 203 13 Malmö 203 13 Malmö (SE)