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EP 4 514 683 A1

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(43) Date of publication: 05.03.2025 Bulletin 2025/10 (21) Application number: 23797003.3 (22) Date of filing: 04.04.2023

(51) International Patent Classification (IPC):  B64C 29/00(2006.01) B64D 27/00(2006.01) B64D 27/08(2006.01) B64D 27/14(2006.01) B64C 29/02(2006.01) B64D 27/04(2006.01) B64D 27/10(2006.01) (52) Cooperative Patent Classification (CPC): B64C 29/02; B64C 29/00; B64C 29/0016; B64D 37/04; B64D 37/005; B64D 2041/002; B64D 41/00; B64D 2221/00; B60L 2200/10; B60L 50/61; B60L 2220/42; B64D 27/33; B64D 27/357; B64D 31/18 (86) International application number: PCT/US2023/017382 (87) International publication number: WO 2023/211639 (02.11.2023 Gazette 2023/44)

(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: 29.04.2022 US 202217733487 29.04.2022 US 202217733686 30.04.2022 US 202217734014 01.03.2023 US 202318116141 (71) Applicant: Beta Air, LLC South Burlington, Vermont 05403 (US)

(72) Inventors: CLARK, Kyle B. BURLINGTON, Vermont 05403 (US) WIEGMAN, Herman BURLINGTON, Vermont 05403 (US) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)