Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-01-10
2006-01-10
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S323020, C310S323190
Reexamination Certificate
active
06984920
ABSTRACT:
The present invention relates to a linear motor which draws its operating power from ultrasonic vibration above the frequency of 20 kHz which is generated by piezoelectric ceramic. More particularly, the invention relates to a linear piezoelectric ultrasonic motor which linearly operates a slider due to a frictional force generated by applying sinusoidal electric field with a 90 degree phase difference to a pair of piezoelectric ceramic. This causes an elliptical mechanical vibration on a shaking beam which is connected to the piezoelectric ceramic.
REFERENCES:
patent: 4562374 (1985-12-01), Sashida
patent: 5448128 (1995-09-01), Endo et al.
Choi Ji Won
Kang Chong Yun
Kim Hyun Jai
Lee Dong Kyun
Vasiljev Piotr
Budd Mark
Harness & Dickey & Pierce P.L.C.
Korea Institute of Science and Technology
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