Patent ID: 7723890

Claim:
An electric motor comprising: an armature core having an axis and defining a plurality of armature slots arranged in a circumferential direction of the armature core; a commutator having the same axis as the armature core and spaced from the armature core in an axial direction, wherein the commutator includes a plurality of commutator segments arranged in a circumferential direction of the commutator; a neck disposed between the armature core and the commutator and having a diameter smaller than the commutator, and a plurality of wires extending around the armature core through the armature slots of the armature core; wherein each wire extends along a path in which each wire (a) extends from a first one of the commutator segments to the outer circumference of the neck and extends around a part thereof, (b) extends through a first one of the armature slots of the armature core, turns from the first one of the armature slots to extend through a second one of the armature slots next to the first one of the armature slots, and extends through a third one of the armature slots positioned opposite to the second one of the armature slots with respect to the axis of the armature core, (c) extends around the armature core through the third one and the first one of the armature slots and leaves the first one of the armature slots; and (d) extends around a part of the outer circumference of the neck and extends from the neck to a second one of the commutator segments next to the first one of the commutator segments; and wherein the first one and the second one of the armature slots are offset from the first one and the second one of the commutator segments, respectively, by an angle of approximately 180° about the axis.