Patent ID: 7211986
Filing Date: 2007-05-01
Classification: H02J

Abstract:
1. An apparatus for inductive charging a battery comprising: a housing with a lower surface and a charging surface, wherein a rechargeable device with a rechargeable battery may be variably placed on the charging surface; a controller for driving an oscillator, wherein the controller receives power from a power source; a first charger coil disposed within the housing; a second charger coil disposed within the housing, wherein the first charger coil and the second charger coil are coupled to the oscillator and create a substantially horizontal magnetic field in a volume of space above the charging surface; and one or more permeable tiles disposed on or below the charging surface and above the first charger coil and the second charger coil, wherein the one or more permeable tiles form a controlled permeable path to limit field leakage from the charging surface.