(19)

(11)

EP 2 207 967 A1

(12)

(43) Date of publication: 21.07.2010 Bulletin 2010/29 (21) Application number: 08847294.9 (22) Date of filing: 29.10.2008

(51) International Patent Classification (IPC):  F04D 23/00(2006.01) F04D 29/66(2006.01) F04D 29/28(2006.01) (86) International application number: PCT/EP2008/009119 (87) International publication number: WO 2009/059718 (14.05.2009 Gazette 2009/20)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 05.11.2007 DE 102007053017 (71) Applicant: Gardner Denver Deutschland GmbH 97616 Bad Neustadt (DE)	(72) Inventors: DITTMAR, Rudi, Dr. 98590 Wernshausen (DE) GROHMANN, Thomas 98617 Meiningen (DE) KEMPF, Mario 97616 Bad Neustadt (DE) (74) Representative: Rau, Albrecht et al Patentanwälte Rau, Schneck & Hübner Königstrasse 2 90402 Nürnberg 90402 Nürnberg (DE)