(19)

(11)

EP 3 423 691 A1

(12)

(43) Date of publication: 09.01.2019 Bulletin 2019/02 (21) Application number: 17709754.0 (22) Date of filing: 01.03.2017

(51) International Patent Classification (IPC):  F02B 33/40(2006.01) H02K 9/00(2006.01) F02B 39/00(2006.01) F02B 37/04(2006.01) H02K 1/32(2006.01) F01D 1/00(2006.01) F02B 39/10(2006.01) (86) International application number: PCT/GB2017/050549 (87) International publication number: WO 2017/149303 (08.09.2017 Gazette 2017/36)

(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 MD (30) Priority: 01.03.2016 GB 201603549 (71) Applicant: Aeristech Limited Kenilworth, Warwickshire CV8 2FD (GB)	(72) Inventors: XU, Hao Kenilworth Warwickshire CV8 2FD (GB) RICHARDS, Bryn Geoffrey Roddick Kenilworth Warwickshire CV8 2FD (GB) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)