Patent ID: 6900573

Claim:
A rotor core lamination for a laminated rotor, the lamination comprising: a substantially cylindrical body having a central axis and an outer circumference, the substantially cylindrical body comprising a first planar surface and a second planar surface opposite the first planar surface; a plurality of apertures disposed between the central axis and the outer circumference of the substantially cylindrical body, the plurality of apertures extending from the first planar surface to the second planar surface; a plurality of channels being disposed in the first planar surface of the substantially cylindrical body, each channel of the plurality of channels being disposed adjacent to a corresponding aperture of the plurality of apertures; a plurality of collar portions being configured and disposed to extend from the second planar surface of the substantially cylindrical body, each collar portion of the plurality of collar portions being disposed adjacent to a corresponding aperture of the plurality of apertures; and wherein each collar portion of the plurality of collar portions is configured and disposed to fit within a corresponding channel of the plurality of channels of another lamination upon assembly of the lamination in the laminated rotor.