(19)

(11)

EP 4 031 731 A1

(12)

(43) Date of publication: 27.07.2022 Bulletin 2022/30 (21) Application number: 20771350.4 (22) Date of filing: 11.08.2020

(51) International Patent Classification (IPC):  E04H 12/00(2006.01) F21V 21/00(2006.01) (52) Cooperative Patent Classification (CPC): E04H 12/003; E04H 12/02; E04H 12/08; E04H 12/12; E03B 1/00; Y02T 10/70; Y02T 10/7072; Y02T 90/12 (86) International application number: PCT/IB2020/057529 (87) International publication number: WO 2021/028825 (18.02.2021 Gazette 2021/07)

(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: 12.08.2019 SE 1930265 (71) Applicant: Nuculus AS 7041 Trondheim (NO)	(72) Inventor: JOHANSSON, Roland 280 22 Vittsjö (SE) (74) Representative: Basck Ltd  Basck Limited 9 Hills Road Cambridge CB2 1GE Cambridge CB2 1GE (GB)