(19)

(11)

EP 2 310 669 A1

(12)

(43) Date of publication: 20.04.2011 Bulletin 2011/16 (21) Application number: 09784671.1 (22) Date of filing: 09.07.2009

(51) International Patent Classification (IPC):  F03B 17/06(2006.01) (86) International application number: PCT/GB2009/001710 (87) International publication number: WO 2010/004286 (14.01.2010 Gazette 2010/02)

(84) Designated Contracting States: 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 SE SI SK SM TR Designated Extension States: AL BA RS (30) Priority: 09.07.2008 GB 0812524 (71) Applicant: Mowat Technical & Design Services Ltd Caithness KW12 6UP (GB)	(72) Inventor: MOWAT, James Caithness KW12 6UP (GB) (74) Representative: Hargreaves, Timothy Edward  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)