(19)

(11)

EP 4 161 591 A1

(12)

(43) Date of publication: 12.04.2023 Bulletin 2023/15 (21) Application number: 21818217.8 (22) Date of filing: 03.06.2021

(51) International Patent Classification (IPC):  A61L 2/10(2006.01) B62B 3/14(2006.01) (52) Cooperative Patent Classification (CPC): A61L 2/10; A61L 2202/122 (86) International application number: PCT/SE2021/050520 (87) International publication number: WO 2021/246944 (09.12.2021 Gazette 2021/49)

(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: 05.06.2020 SE 2050659 (71) Applicant: Whitebox AB 931 33 Skellefteå (SE)	(72) Inventor: WIKSTRÖM, Erik 931 33 Skellefteå (SE) (74) Representative: Zacco Sweden AB  P.O. Box 5581 Löjtnantsgatan 21 114 85 Stockholm 114 85 Stockholm (SE)