(19)

(11)

EP 2 638 354 A2

(12)

(88) Date of publication A3: 20.12.2012 (43) Date of publication: 18.09.2013 Bulletin 2013/38 (21) Application number: 10859593.5 (22) Date of filing: 10.11.2010

(51) International Patent Classification (IPC):  F41H 5/04(2006.01) (86) International application number: PCT/IT2010/000449 (87) International publication number: WO 2012/063271 (18.05.2012 Gazette 2012/20)

(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 (71) Applicant: Petroceramics S.p.A. 20133 Milano (IT)	(72) Inventor: VALLE, Massimiliano I-24125 Bergamo (IT) (74) Representative: Leihkauf, Steffen Falk et al Jacobacci & Partners S.p.A. Via Senato 8 20121 Milano 20121 Milano (IT)