Patent ID: 7259493

Claim:
A stator for use in a two rotor single stator type electric motor in which inner and outer rotors are rotated independently with respect to each other within and around the stator upon application of current to the stator, the stator comprising: a stator core including a plurality of stator teeth that are independent with respect to one another and circumferentially arranged around a common axis, each stator tooth including a plurality of flat magnetic steel plates that are aligned along the common axis while contacting one another; and at least one connecting ring plate coaxially installed in the stator core in such a manner that the ring plate is put between adjacent two of the flat magnetic steel plates of each stator tooth while contacting both of the flat magnetic steel plates, the ring plate being of an endless annular member, wherein the connecting ring plate includes: an annular outer base portion; and a plurality of finger portions that radially extend inward from the annular outer base portion.