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(11)

EP 4 441 368 A1

(12)

(43) Date of publication: 09.10.2024 Bulletin 2024/41 (21) Application number: 22821918.4 (22) Date of filing: 22.11.2022

(51) International Patent Classification (IPC):  F04D 17/16(2006.01) F04D 29/32(2006.01) E01H 1/00(2006.01) F04D 29/28(2006.01) F04D 29/44(2006.01) (52) Cooperative Patent Classification (CPC): F04D 17/16; F04D 29/281; F04D 29/329; F04D 29/441; F05D 2250/51; E01H 1/053; E01H 1/0836 (86) International application number: PCT/EP2022/082798 (87) International publication number: WO 2023/099284 (08.06.2023 Gazette 2023/23)

(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: 02.12.2021 GB 202117414 (71) Applicant: BUCHER MUNICIPAL LIMITED Dorking, Surrey RH4 1XF (GB)	(72) Inventors: SUN, Jining Slough Berkshire SL3 7SJ (GB) KNOPP, Gareth, James Kent ME7 3QT (GB) OFFLEY, Clive, Frederick Surrey CR3 6EL (GB) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)