(19)

(11)

EP 4 135 928 A1

(12)

(43) Date of publication: 22.02.2023 Bulletin 2023/08 (21) Application number: 21720027.8 (22) Date of filing: 12.04.2021

(51) International Patent Classification (IPC):  B24B 3/54(2006.01) (52) Cooperative Patent Classification (CPC): B24B 3/54 (86) International application number: PCT/SE2021/050332 (87) International publication number: WO 2021/211037 (21.10.2021 Gazette 2021/42)

(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: 13.04.2020 SE 2030123 (71) Applicant: Eklund, Tore 59194 Motala (SE)	(72) Inventor: Eklund, Tore 59194 Motala (SE) (74) Representative: Eisenführ Speiser  Patentanwälte Rechtsanwälte PartGmbB Postfach 31 02 60 80102 München 80102 München (DE)