(19)

(11)

EP 4 511 574 A1

(12)

(43) Date of publication: 26.02.2025 Bulletin 2025/09 (21) Application number: 23720341.9 (22) Date of filing: 19.04.2023

(51) International Patent Classification (IPC):  F04D 19/04(2006.01) F04D 29/059(2006.01) F04D 29/058(2006.01) F04D 29/056(2006.01) F04D 29/66(2006.01) (52) Cooperative Patent Classification (CPC): F04D 19/04; F04D 19/048; F04D 29/056; F04D 29/059; F04D 29/058; F04D 29/668; F16C 27/04; F16C 35/077; F16C 2229/00; F16C 2360/45; F16C 27/066; F16C 2226/60; F16C 25/083; F16C 25/086 (86) International application number: PCT/GB2023/051027 (87) International publication number: WO 2023/203325 (26.10.2023 Gazette 2023/43)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 20.04.2022 GB 202205736 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)	(72) Inventor: SMITH, Paul David Burgess Hill, Sussex RH15 9TW (GB) (74) Representative: Booth, Andrew Steven  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)