(19)

(11)

EP 4 153 864 A1

(12)

(43) Date of publication: 29.03.2023 Bulletin 2023/13 (21) Application number: 21729594.8 (22) Date of filing: 18.05.2021

(51) International Patent Classification (IPC):  F04D 19/04(2006.01) F28F 3/12(2006.01) F04D 29/58(2006.01) (52) Cooperative Patent Classification (CPC): F04D 29/584; F04D 29/5813; F04D 19/042; F28F 3/12; F28F 13/12; F28D 1/03; F28F 3/048; F28F 3/046 (86) International application number: PCT/GB2021/051188 (87) International publication number: WO 2021/234363 (25.11.2021 Gazette 2021/47)

(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: 20.05.2020 GB 202007489 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)	(72) Inventor: KAILASAM, Sivabalan Burgess Hill Sussex RH15 9TW (GB) (74) Representative: Ford, Alexander  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)