(19)

(11)

EP 4 081 713 A1

(12)

(43) Date of publication: 02.11.2022 Bulletin 2022/44 (21) Application number: 20838450.3 (22) Date of filing: 18.12.2020

(51) International Patent Classification (IPC):  F04C 18/12(2006.01) F04C 28/28(2006.01) F01C 21/10(2006.01) F04C 23/00(2006.01) F04C 25/02(2006.01) F04C 28/02(2006.01) (52) Cooperative Patent Classification (CPC): F04C 18/126; F04C 23/001; F04C 28/02; F04C 2230/90; F04C 2270/17; F01C 21/102; F04C 28/28; F04C 25/02 (86) International application number: PCT/EP2020/087057 (87) International publication number: WO 2021/130118 (01.07.2021 Gazette 2021/26)

(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: 23.12.2019 GB 201919166 (71) Applicant: Edwards, S.R.O. 78349 Lutin (CZ)	(72) Inventor: KORYCAN, Jiri 783 49 Lutin (CZ) (74) Representative: Totman, Clare Elizabeth  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)