(19)

(11)

EP 4 288 599 A1

(12)

(43) Date of publication: 13.12.2023 Bulletin 2023/50 (21) Application number: 22700226.8 (22) Date of filing: 05.01.2022

(51) International Patent Classification (IPC):  D06F 57/06(2006.01) F16B 7/04(2006.01) (52) Cooperative Patent Classification (CPC): F16B 7/0473; D06F 57/06; F16B 21/086 (86) International application number: PCT/EP2022/050111 (87) International publication number: WO 2022/167162 (11.08.2022 Gazette 2022/32)

(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 (30) Priority: 04.02.2021 EP 21155116 (71) Applicant: Carl Freudenberg KG 69469 Weinheim (DE)	(72) Inventors: HEM, Sudhana 36020 Solagna (Vi) (IT) ZANGIROLAMI, Mattia 35020 San Pietro Viminario (PD) (IT)