Patent ID: 7958764

Claim:
A method of providing an armature housing, comprising the steps of: providing a solid cylinder of malleable material having a first part and a second part; extruding at least a part of a perimeter of the first part in a direction away from the second part for defining a raised wall; compressing the second part in an axial direction toward the first part, resulting in a solid, flattened disc generally perpendicular to the first part; and reducing a thickness of the raised wall to be less than a thickness of the solid, flattened disc for facilitating a flow of energy; and magnetically annealing the armature housing after each of the steps of: providing a solid cylinder of malleable material having a first part and a second part; extruding at least a part of a perimeter of the first part in a direction away from the second part for defining a raised wall; compressing the second part in an axial direction toward the first part, resulting in a solid, flattened disc generally perpendicular to the first part; and reducing a thickness of the raised wall to be less than a thickness of the solid, flattened disc; wherein the first part, second part, and at least part of the perimeter are all integrally connected as a single piece.