(19)

(11)

EP 4 062 068 A1

(12)

(43) Date of publication: 28.09.2022 Bulletin 2022/39 (21) Application number: 20801396.1 (22) Date of filing: 03.11.2020

(51) International Patent Classification (IPC):  F04C 18/02(2006.01) F04C 29/04(2006.01) F04C 25/02(2006.01) (52) Cooperative Patent Classification (CPC): F04C 18/0215; F04C 25/02; F04C 29/04; F04C 18/0253; F04C 2240/30 (86) International application number: PCT/GB2020/052782 (87) International publication number: WO 2021/099759 (27.05.2021 Gazette 2021/21)

(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: 19.11.2019 GB 201916841 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)	(72) Inventors: LAMB, Peter Charles Burgess Hill Sussex RH15 9TW (GB) GALTRY, Michael Andrew 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)