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(11)

EP 2 641 020 A2

(12)

(88) Date of publication A3: 12.07.2012 (43) Date of publication: 25.09.2013 Bulletin 2013/39 (21) Application number: 11797121.8 (22) Date of filing: 28.10.2011

(51) International Patent Classification (IPC):  F23B 80/04(2006.01) F23J 15/02(2006.01) (86) International application number: PCT/IB2011/054800 (87) International publication number: WO 2012/066441 (24.05.2012 Gazette 2012/21)

(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 (30) Priority: 15.11.2010 IT VR20100212 (71) Applicant: Gruppo Piazzetta S.p.A. 31010 Casella d'Asolo (Treviso) (IT)

(72) Inventors: BORDIGNON, Michele I-31011 Asolo (Treviso) (IT) DE MARCHI, Denis I-31011 Asolo (Treviso) (IT) DE ZEN, Fabio I-31011 Asolo (Treviso) (IT) PIROLLO, Enrico I-31011 Asolo (Treviso) (IT) PIROLO, Giorgio I-31011 Asolo (Treviso) (IT) REPETTI, Riccardo I-31011 Asolo (Treviso) (IT) (74) Representative: Feltrinelli, Secondo Andrea  APTA S.r.l. Patent Department Via Ca' di Cozzi, 41 37124 Verona 37124 Verona (IT)