(19)

(11)

EP 4 240 931 A1

(12)

(43) Date of publication: 13.09.2023 Bulletin 2023/37 (21) Application number: 21890247.6 (22) Date of filing: 08.11.2021

(51) International Patent Classification (IPC):  E05D 13/00(2006.01) E06B 9/60(2006.01) E06B 9/62(2006.01) E06B 9/56(2006.01) E06B 9/80(2006.01) E05D 15/38(2006.01) (52) Cooperative Patent Classification (CPC): E05D 15/38; E05D 13/1261; E05F 15/686; E05Y 2900/106; E05Y 2201/654; E05Y 2201/492 (86) International application number: PCT/US2021/058477 (87) International publication number: WO 2022/099146 (12.05.2022 Gazette 2022/19)

(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: 06.11.2020 US 202063110834 P (71) Applicant: Feng, David Northville, MI 48168 (US)	(72) Inventor: Feng, David Northville, MI 48168 (US) (74) Representative: Lichtnecker, Markus Christoph  Lichtnecker & Lichtnecker Patent- und Rechtsanwaltspartnerschaft mbB Im Schloßpark Gern 2 84307 Eggenfelden 84307 Eggenfelden (DE)