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(11)

EP 4 584 525 A1

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(43) Date of publication: 16.07.2025 Bulletin 2025/29 (21) Application number: 23768390.9 (22) Date of filing: 05.09.2023

(51) International Patent Classification (IPC):  F16L 37/36(2006.01) F16L 59/065(2006.01) F16L 37/244(2006.01) F16L 59/18(2006.01) (52) Cooperative Patent Classification (CPC): F16L 37/244; F16L 37/36; F16L 59/065; F16L 59/188 (86) International application number: PCT/SE2023/050876 (87) International publication number: WO 2024/054147 (14.03.2024 Gazette 2024/11)

(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: KH MA MD TN (30) Priority: 05.09.2022 SE 2251026 (71) Applicant: Mann Teknik AB 542 31 Mariestad (SE)	(72) Inventors: KOPPLIN, Gerhard 542 73 Mariestad (SE) LI, Guanying 545 33 Töreboda (SE) (74) Representative: Bergenstråhle & Partners AB  P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)