(19)

(11)

EP 4 537 008 A1

(12)

(43) Date of publication: 16.04.2025 Bulletin 2025/16 (21) Application number: 23824528.6 (22) Date of filing: 13.06.2023

(51) International Patent Classification (IPC):  F21K 9/66(2016.01) F21V 33/00(2006.01) (52) Cooperative Patent Classification (CPC): F21V 7/041; F21W 2111/00; F21V 21/096; F21Y 2115/10 (86) International application number: PCT/US2023/025229 (87) International publication number: WO 2023/244626 (21.12.2023 Gazette 2023/51)

(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: 13.06.2022 US 202217839150 (71) Applicant: Archangel Device LLC Waukesha, WI 53186 (US)	(72) Inventor: DIR, Ronald R. Sturtevant, WI 53177 (US) (74) Representative: Maiwald GmbH  Engineering Elisenhof Elisenstrasse 3 80335 München 80335 München (DE)