(19)

(11)

EP 1 969 431 A1

(12)

(43) Date of publication: 17.09.2008 Bulletin 2008/38 (21) Application number: 06838916.2 (22) Date of filing: 04.12.2006

(51) International Patent Classification (IPC):  G05B 19/042(2006.01) G08C 17/02(2006.01) A47L 11/30(2006.01) (86) International application number: PCT/US2006/046213 (87) International publication number: WO 2007/064989 (07.06.2007 Gazette 2007/23)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 02.12.2005 US 741659 P (71) Applicant: TENNANT COMPANY Minneapolis, MN 55440 (US)	(72) Inventors: ERKO, Robert, J. Apple Valley, MN 55124 (US) GROSCHEN, Paul, L., Jr. White Bear Lake, MN 55110 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)