Patent ID: 7772733
Filing Date: 2010-08-10
Classification: H02K

Abstract:
1. A flat electrical generator comprising: a shaft; a rotary disk fixedly mounted on said shaft; a first stationary disk made of plastic and having a central bore in which is fitted a bearing, a plurality of brush holes and bolt receiving holes defined in an inside face of said first stationary disk and distributed along a circumference of said central bore; a second stationary disk made of plastic having a central bore in which is fitted a bearing; said rotary disk being coupled to said first and second stationary disks by means of portions of said shaft that project beyond opposite faces of said stationary disks and fit into said bearings fixed in said bores of said stationary disks, thereby positioning said rotary disk between said stationary disks; a plurality of carbon brushes each received in a respective one of said carbon brush holes of said first stationary disk and kept from falling out of said stationary disk by retention bolts received in a respective one of said bolt receiving holes; a plurality of coil sets each formed by continuously winding a wire to form a plurality of turns that are at least partially offset with respect to each other, said coil sets being completely embedded in said rotary disk; two first semi-circular magnets fixed to an inside face of said first stationary disk; and two second semi-circular magnets fixed to an inside face of said second stationary disk.