(19)

(11)

EP 4 093 248 A1

(12)

(43) Date of publication: 30.11.2022 Bulletin 2022/48 (21) Application number: 21702088.2 (22) Date of filing: 22.01.2021

(51) International Patent Classification (IPC):  A47F 3/04(2006.01) (52) Cooperative Patent Classification (CPC): A47F 3/0447; A47F 3/0469 (86) International application number: PCT/GB2021/050157 (87) International publication number: WO 2021/148812 (29.07.2021 Gazette 2021/30)

(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: 24.01.2020 GB 202001071 (71) Applicant: Aerofoil Energy Limited Cheshire SK10 5JB (GB)	(72) Inventor: MCANDREW, Paul Poynton Cheshire SK12 1SR (GB) (74) Representative: Cooley (UK) LLP  22 Bishopsgate London EC2N 4BQ London EC2N 4BQ (GB)