Patent ID: 7291955

Claim:
An electric motor stator comprising: a plurality of teeth disposed in a radial form centered about a predetermined center axis; insulators respectively covering said plurality of teeth, said insulators being composed of first partitions for covering a first half of said plurality of teeth from the center axially along the teeth, and second partitions for covering a second half of said plurality of teeth from the center axially along the teeth, wherein said first partitions, along the outer side of each of flanks, parallel to the center axis, of said plurality of teeth, are provided with a first taper surface located on a second-partition-directed end thereof, wherein along the one flank of each tooth on which said conductor is wound to head from said first half toward said second half, said first taper surface is disposed on the inner-side surface of said first partition opposing that tooth flank, and along the other flank of each tooth on which said conductor is wound to head from said second half toward said first half, said first taper surface is disposed on the outer-side surface of said first partition; and said second partitions, along the outer side of each flank of said plurality of teeth, are provided with a second taper surface located on a first-partition-directed end thereof, and making an overlapping fit with said first taper surface, wherein along the one flank of each tooth on which said conductor is wound to head from said first half toward said second half, said second taper surface is disposed on the outer-side surface of said second partition, opposite the side thereof opposing that tooth flank, and along the other flank of each tooth on which said conductor is wound to head from said second half toward said first half, said second taper surface is disposed on the inner-side surface of said second partition; and a plurality of coils provided on each of said plurality of teeth by winding conductors onto said insulators through to multiple layers.