(19)

(11)

EP 1 659 914 A1

(12)

(43) Date of publication: 31.05.2006 Bulletin 2006/22 (21) Application number: 04783002.1 (22) Date of filing: 02.09.2004

(51) International Patent Classification (IPC):  A47L 7/00(1968.09) (86) International application number: PCT/US2004/028616 (87) International publication number: WO 2005/020778 (10.03.2005 Gazette 2005/10)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 02.09.2003 US 653347 30.12.2003 US 749129 (71) Applicant: TENNANT COMPANY Minneapolis, MN 55440 (US)	(72) Inventors: FIELD, Bruce, F. Golden Valley, MN 55422 (US) CHRISTENSEN, Bryan, L. Dayton, MN 55327 (US) BLANCHARD, Eric, A. Orono, MN 55359 (US) (74) Representative: McLeish, Nicholas Alistair Maxwell  Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)