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EP 4 489 875 A2

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(88) Date of publication A3: 09.11.2023 (43) Date of publication: 15.01.2025 Bulletin 2025/03 (21) Application number: 23767574.9 (22) Date of filing: 02.03.2023

(51) International Patent Classification (IPC):  A63B 53/04(2015.01) A63B 60/54(2015.01) B21K 17/00(2006.01) A63B 60/40(2015.01) B21J 5/00(2006.01) (52) Cooperative Patent Classification (CPC): A63B 53/0408; A63B 53/0458; A63B 53/047; A63B 60/02 (86) International application number: PCT/US2023/063621 (87) International publication number: WO 2023/172842 (14.09.2023 Gazette 2023/37)

(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: 11.03.2022 US 202217654555 11.03.2022 US 202263269232 P 28.04.2022 US 202263363780 P 18.05.2022 US 202263364949 P 29.08.2022 US 202263373831 P 07.10.2022 US 202263378811 P (71) Applicant: Karsten Manufacturing Corporation Phoenix, AZ 85029 (US)

(72) Inventors: HUANG, Yujen Phoenix, Arizona 85029 (US) HENRIKSON, Erik, M. Phoenix, Arizona 85029 (US) SCHIER, Matthew, T. Phoenix, Arizona 85029 (US) SIMONE, Matthew, W. Phoenix, Arizona 85029 (US) (74) Representative: Tombling, Adrian George  Withers & Rogers LLP 2 London Bridge London SE1 9RA London SE1 9RA (GB)