(19)

(11)

EP 4 739 933 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24743506.8 (22) Date of filing: 04.07.2024

(51) International Patent Classification (IPC):  F16J 15/3284(2016.01) F16F 9/36(2006.01) B29C 45/00(2006.01) G01M 13/005(2019.01) F16F 9/02(2006.01) F16F 9/43(2006.01) G01M 11/08(2006.01) G01N 21/88(2006.01) (52) Cooperative Patent Classification (CPC): F16F 9/36; F16F 9/0218; F16F 2230/30; F16J 15/3284; G01N 21/95; G01M 13/005 (86) International application number: PCT/IB2024/056541 (87) International publication number: WO 2025/012762 (16.01.2025 Gazette 2025/03)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 07.07.2023 IT 202300014262 (71) Applicant: Special Springs S.r.l. 36060 Romano d'Ezzelino (VI) (IT)	(72) Inventors: CAPPELLER, Augusto 36060 Romano d'Ezzelino (VI) (IT) FIORESE, Massimo 36060 Romano d'Ezzelino (VI) (IT) GUSELLA, Giovanni 36060 Romano d'Ezzelino (VI) (IT) (74) Representative: Studio Torta S.p.A.  Via Viotti, 9 10121 Torino 10121 Torino (IT)