Patent ID: 7210215

Claim:
A method of manufacturing a winding comprising: forming a substantially U-shaped electric conductor by bending a longitudinal wire so that the U-shaped electric conductor has a first straight portion, a second straight portion and a turn portion that includes a first curve portion and a second curve portion each protruding in a direction perpendicular to longitudinal directions of the first straight portion and the second straight portion; inclining the first curve portion and the second curve portion with respect to a longitudinal direction of the turn portion when viewed along the longitudinal directions of the first straight portion and the second straight portion by bending the conductor such that the plane containing the first curve portion is rotated about an axis defined by the longitudinal direction of the first straight portion, and the plane containing the second curve portion is rotated about an axis defined by the longitudinal direction of the second straight portion, so that the first curve portion and the second curve portion incline oppositely to each other with respect to the longitudinal direction of the turn portion; and maintaining un-inclined a section of the turn portion between the first curve portion and the second curve portion thereby forming the winding.