(19)

(11)

EP 3 172 406 A1

(12)

(43) Date of publication: 31.05.2017 Bulletin 2017/22 (21) Application number: 15741278.4 (22) Date of filing: 17.07.2015

(51) International Patent Classification (IPC):  F01C 21/10(2006.01) F04C 27/00(2006.01) F04C 23/00(2006.01) F04C 18/08(2006.01) (86) International application number: PCT/GB2015/052068 (87) International publication number: WO 2016/012758 (28.01.2016 Gazette 2016/04)

(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: MA (30) Priority: 21.07.2014 GB 201412924 (71) Applicant: Edwards Limited Burgess Hill West Sussex RH15 9TW (GB)	(72) Inventors: HOLBROOK, Alan Ernest Kinnaird Burgess Hill Sussex RH15 9TW (GB) TRIKOILIS, Nomikos Burgess Hill Sussex RH15 9TW (GB) (74) Representative: Norton, Ian Andrew  Edwards Limited Innovation Drive Burgess Hill West Sussex RH15 9TW West Sussex RH15 9TW (GB)