(19)

(11)

EP 2 091 389 A2

(12)

(88) Date of publication A3: 12.09.2008 (43) Date of publication: 26.08.2009 Bulletin 2009/35 (21) Application number: 07868948.6 (22) Date of filing: 30.11.2007

(51) International Patent Classification (IPC):  A47B 97/00(2006.01) (86) International application number: PCT/US2007/086009 (87) International publication number: WO 2008/067508 (05.06.2008 Gazette 2008/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 30.11.2006 US 861877 P (71) Applicant: Waterloo Industries Inc. Waterloo, IA 50704 (US)	(72) Inventor: KALKWARF, William C. Cedar Falls, IA 50613 (US) (74) Representative: Quintelier, Claude et al Gevers & Vander Haeghen Intellectual Property House Holidaystraat 5 Brussels Airport Business Park 1831 Diegem 1831 Diegem (BE)