Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-10-03
2006-10-03
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C359S383000, C359S557000, C310S323140, C250S201900
Reexamination Certificate
active
07116038
ABSTRACT:
An ultrasonic motor of the present invention has a vibrating element6. The vibrating element6includes a first piezoelectric element62that undergoes extension and contraction by application of an AC voltage, a reinforcing plate63having a contact portion66and an arm portion68, and a second piezoelectric element64that undergoes extension and contraction by application of an AC voltage. The first piezoelectric element62, the reinforcing plate63, and the second piezoelectric element64are laminated in this order. The vibrating element6is fixedly mounted through the arm portion68so that the contact portion66abuts on a driven element (rotor51). Further, the vibrating element6has a body portion and a length L of the body portion in a direction in which the vibrating element6extends and contracts by application of the AC voltage is 1 to 20 mm.
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Communication from European Patent Office re: related application.
Hashimoto Yasuharu
Miyazawa Osamu
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