(19)

(11)

EP 2 898 220 A1

(12)

(43) Date of publication: 29.07.2015 Bulletin 2015/31 (21) Application number: 13725717.6 (22) Date of filing: 30.05.2013

(51) International Patent Classification (IPC):  F04D 29/56(2006.01) (86) International application number: PCT/EP2013/061204 (87) International publication number: WO 2014/044422 (27.03.2014 Gazette 2014/13)

(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 (30) Priority: 18.09.2012 EP 12184888 (71) Applicant: Grundfos Holding A/S 8850 Bjerringbro (DK)	(72) Inventor: JESSEN, Allan DK-7160 Tørring (DK) (74) Representative: Patentanwälte Vollmann & Hemmer  Wallstraße 33a 23560 Lübeck 23560 Lübeck (DE)