Patent ID: 6933656

Claim:
An ultrasonic motor comprising: a stator that includes: at least one piezoelectric element; a flexible aluminum-based connective arrangement that includes a plurality of aluminum-based electrodes, which apply a voltage to the at least one piezoelectric element to generate a vibration from the at least one piezoelectric element, wherein each aluminum-based electrode is made of one of aluminum and an aluminum alloy and directly contacts a corresponding one of axial ends of the at least one piezoelectric element; and a plurality of aluminum-based metal blocks, each of which is made of one of aluminum and an aluminum alloy, wherein the at least one piezoelectric element and the aluminum-based electrodes are interposed between corresponding two of the aluminum-based metal blocks; and a rotor that is slidably and rotatably urged against the stator, wherein the rotor is rotated upon generation of the vibration in the stator, wherein: the plurality of aluminum-based electrodes includes a first group of aluminum-based electrodes and a second group of aluminum-based electrodes; the flexible aluminum-based connective arrangement further includes a first conductive line and a second conductive line; the first conductive line is electrically connected to the aluminum-based electrodes of the first group; and the second conductive line is electrically connected to the aluminum-based electrodes of the second group.