(19)

(11)

EP 3 140 543 A2

(12)

(88) Date of publication A3: 21.01.2016 (43) Date of publication: 15.03.2017 Bulletin 2017/11 (21) Application number: 15725396.4 (22) Date of filing: 23.04.2015

(51) International Patent Classification (IPC):  F04B 17/03(2006.01) F04B 53/08(2006.01) F04B 49/06(2006.01) F04B 53/16(2006.01) (86) International application number: PCT/GB2015/051196 (87) International publication number: WO 2015/162427 (29.10.2015 Gazette 2015/43)

(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: 23.04.2014 GB 201407154 (71) Applicant: S. A. Armstrong Limited Scarborough, Ontario M1L 2P3 (CA)	(72) Inventors: ARMSTRONG, Charles Toronto, Ontario M4W 2A2 (CA) BARNARD, Alan Manchester Greater Manchester M11 2ET (GB) DERBYSHIRE, Lee Manchester Greater Manchester M11 2ET (GB) LINDOP, John Manchester Greater Manchester M11 2ET (GB) (74) Representative: Appleyard Lees IP LLP  15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)