(19)

(11)

EP 2 005 551 A2

(12)

(88) Date of publication A3: 24.04.2008 (43) Date of publication: 24.12.2008 Bulletin 2008/52 (21) Application number: 07754755.2 (22) Date of filing: 02.04.2007

(51) International Patent Classification (IPC):  H02J 1/02(2006.01) (86) International application number: PCT/US2007/008286 (87) International publication number: WO 2007/117449 (18.10.2007 Gazette 2007/42)

(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: 31.03.2006 US 788322 P (71) Applicant: Leveler LLC Downers Grove IL 60515 (US)	(72) Inventors: JANUSZEWSKI, Michael, W. Downers Grove, IL 60516 (US) WEBSTER, Leonard, E. Chicago, IL 60657 (US) (74) Representative: Smith, Peter James  Serjeants 25 The Crescent King Street Leicester LE1 6RX Leicester LE1 6RX (GB)