(19)

(11)

EP 3 655 657 A1

(12)

(43) Date of publication: 27.05.2020 Bulletin 2020/22 (21) Application number: 18745674.4 (22) Date of filing: 11.07.2018

(51) International Patent Classification (IPC):  F04B 43/14(2006.01) F04C 5/00(2006.01) F04B 43/00(2006.01) (86) International application number: PCT/GB2018/051970 (87) International publication number: WO 2019/016521 (24.01.2019 Gazette 2019/04)

(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: KH MA MD TN (30) Priority: 19.07.2017 GB 201711610 (71) Applicant: Charles Austen Pumps Limited Byfleet West Byfleet Surrey KT14 7NY (GB)	(72) Inventors: SHEPHERD, William Eric Byfleet Surrey KT14 7NY (GB) STOKES, Robert William Byfleet Surrey KT14 7NY (GB) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)