(19)

(11)

EP 2 389 470 A1

(12)

(43) Date of publication: 30.11.2011 Bulletin 2011/48 (21) Application number: 10702570.2 (22) Date of filing: 25.01.2010

(51) International Patent Classification (IPC):  D06F 35/00(2006.01) (86) International application number: PCT/US2010/021974 (87) International publication number: WO 2010/085742 (29.07.2010 Gazette 2010/30)

(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 (30) Priority: 23.01.2009 US 146903 P (71) Applicant: Tennant Company Mineapolis, MN 55440 (US)	(72) Inventors: DENISON, Thomas, R. Newport Coast, CA 92657 (US) FIELD, Bruce, F. Golden Valley, MN 55422 (US) ZIMMERMAN, Jonathan, A. St. John's Wood London NW8 OPD (GB) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)