(19)

(11)

EP 4 115 084 A1

(12)

(43) Date of publication: 11.01.2023 Bulletin 2023/02 (21) Application number: 21711326.5 (22) Date of filing: 04.03.2021

(51) International Patent Classification (IPC):  F04C 18/02(2006.01) F04C 27/00(2006.01) F04C 25/02(2006.01) (52) Cooperative Patent Classification (CPC): F04C 18/0215; F04C 25/02; F04C 27/005; F04C 2270/0445; F04C 2240/81; F04C 2270/185; F04C 2270/025 (86) International application number: PCT/GB2021/050539 (87) International publication number: WO 2021/176222 (10.09.2021 Gazette 2021/36)

(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: 05.03.2020 GB 202003220 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)	(72) Inventor: HOLBROOK, Alan Ernest Kinnaird Burgess Hill Sussex RH15 9TW (GB) (74) Representative: Totman, Clare Elizabeth  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)