(19)

(11)

EP 2 167 743 A2

(12)

(88) Date of publication A3: 12.02.2009 (43) Date of publication: 31.03.2010 Bulletin 2010/13 (21) Application number: 08768148.2 (22) Date of filing: 05.06.2008

(51) International Patent Classification (IPC):  E03C 1/266(2006.01) B02C 18/00(2006.01) B09B 3/00(2006.01) (86) International application number: PCT/US2008/007071 (87) International publication number: WO 2008/153898 (18.12.2008 Gazette 2008/51)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 06.06.2007 US 942275 P (71) Applicant: EMERSON ELECTRIC CO. St. Louis, MO 63136-8506 (US)	(72) Inventors: HANSON, Steven P. St. Louis, Missouri 63136-8506 (US) BERGER, Thomas R. St. Louis, Missouri 63136-8506 (US) RYDER, Jerry G. St. Louis, Missouri 63136-8506 (US) (74) Representative: Howson, Richard G.B.  Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)