Patent ID: 7908736
Filing Date: 2011-03-22
Classification: H02K,Y10T

Abstract:
1. A method of making an armature, comprising: placing a commutator having a commutator ring with a plurality of segments with slots between adjacent segments and a lamination stack on an armature shaft to form an assembly; attaching ends of coil windings wound in slots in the lamination stack to tangs at axial inner ends of the commutator ring segments; placing the armature shaft, commutator and lamination stack assembly in a mold; sealing the commutator ring with a seal around the commutator ring near axial outer facing ends of the tangs; and molding an encapsulating material that is liquid during molding around at least portions of the armature shaft, commutator and coil windings with the sealing of the commutator ring preventing the encapsulating material from flowing over the commutator ring or into the slots between the commutator segments.