Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1994-07-15
1997-05-13
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310309, H01L 4108
Patent
active
056295774
ABSTRACT:
A linear actuator device. A first mode of operation uses a single clamping technique whereby a piezoelectric element is slowly expanded, in a way such that a clamping force between that element and its base holds it in place. The piezoelectric element is then contracted in size very quickly, and the inertia created by that action overcomes the clamping force and moves relative to the base. A second mode uses a double clamping technique where first the rear is clamped and the front moved forward then the front is clamped and the rear moved forward. All of these embodiments preferably use semiconductor materials, enabling formation of very thin layers and small devices.
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Jack, Judy; Polla, Dennis L., and Robbins, William P., IEEE Transactions on Ultrasonics, Ferroelectronics, and Frequence Control, vol. 37, No. 5, Sep. 1990 pp. 428-437.
Costin John A.
Erdman Arthur G.
Peichel David J.
Polla Dennis L.
Budd Mark O.
Micro Medical Devices
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