(19)

(11)

EP 3 906 388 A1

(12)

(43) Date of publication: 10.11.2021 Bulletin 2021/45 (21) Application number: 19708890.9 (22) Date of filing: 02.01.2019

(51) International Patent Classification (IPC):  F42B 27/08(2006.01) (52) Cooperative Patent Classification (CPC): F42B 27/08 (86) International application number: PCT/IB2019/050021 (87) International publication number: WO 2019/135173 (11.07.2019 Gazette 2019/28)

(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 Designated Validation States: KH MA MD TN (71) Applicants: Rossi, Osvaldo Carlo Giorgio 31029 Vittorio Veneto (TV) (IT) Napol, Giovanni 31029 Vittorio Veneto (TV) (IT)	(72) Inventor: ROSSI, Osvaldo Carlo Giorgio 31029 Vittorio Veneto (TV) (IT) (74) Representative: Münchow, Vera Ute Barbara  C/o Adexe Srl Corso Porta Nuova, 131 37122 Verona (VR) 37122 Verona (VR) (IT)