(19)

(11)

EP 1 861 660 A2

(12)

(88) Date of publication A3: 22.02.2007 (43) Date of publication: 05.12.2007 Bulletin 2007/49 (21) Application number: 06739349.6 (22) Date of filing: 22.03.2006

(51) International Patent Classification (IPC):  F24H 1/18(2006.01) (86) International application number: PCT/US2006/010522 (87) International publication number: WO 2006/102486 (28.09.2006 Gazette 2006/39)

(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 NL PL PT RO SE SI SK TR (30) Priority: 22.03.2005 US 594241 P (71) Applicant: Emerson Electric Co. St. Louis, MO 63136 (US)	(72) Inventor: DESANTIS, Paul Racine, Wisconsin 53406 (US) (74) Representative: Bryn-Jacobsen, Caelia  Kilburn & Strode, 20, Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)