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(11)

EP 2 349 903 A1

(12)

(43) Date of publication: 03.08.2011 Bulletin 2011/31 (21) Application number: 09740812.4 (22) Date of filing: 16.10.2009

(51) International Patent Classification (IPC):  B66C 13/06(2006.01) B66C 23/70(2006.01) B66F 17/00(2006.01) B66C 13/08(2006.01) B66F 11/04(2006.01) (86) International application number: PCT/US2009/061072 (87) International publication number: WO 2010/045602 (22.04.2010 Gazette 2010/16)

(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 MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 16.10.2008 US 105952 P (71) Applicant: Eaton Corporation Cleveland, Ohio 44114-2584 (US)	(72) Inventors: YUAN, QingHui Osseo, MN 55311 (US) LEW, Jae, Y. Shorewood, MN 55331 (US) PIYABONGKARN, Damrongrit Medina, MN 55340 (US) (74) Representative: Schwan, Ivo  Schwan Schwan Schorer Patentanwälte Bauerstrasse 22 80796 München 80796 München (DE)