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(11)

EP 2 153 137 A1

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(43) Date of publication: 17.02.2010 Bulletin 2010/07 (21) Application number: 08746888.0 (22) Date of filing: 25.04.2008

(51) International Patent Classification (IPC):  F24J 2/50(2006.01) (86) International application number: PCT/US2008/061556 (87) International publication number: WO 2008/134502 (06.11.2008 Gazette 2008/45)

(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 (30) Priority: 26.04.2007 US 740707 (71) Applicant: Beranek, Gerald D. Long Rock, WI 53556 (US)	(72) Inventor: Beranek, Gerald D. Long Rock, WI 53556 (US) (74) Representative: Deambrogi, Edgardo et al Jacobacci & Partners S.p.A. Corso Emilia 8 10152 Torino 10152 Torino (IT)