Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-08-01
2006-08-01
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S324000, C310S366000, C310S369000
Reexamination Certificate
active
07084555
ABSTRACT:
A multi-electrode piezoelectric diaphragm structure includes a diaphragm, piezoelectric material located on the diaphragm, which is defined as having a first area, and a second area. The first area of the piezoelectric is poled in a first direction, and the second area of the piezoelectric is poled in a second direction. The poled first direction is in a Z-axis of the piezoelectric and the poled second direction is in a Radial axis of the piezoelectric. A first electrode is positioned in the first area, on the first surface, of the piezoelectric. A second electrode is positioned in the second area, on the first surface, of the piezoelectric. A third electrode is located on a second surface of the piezoelectric. The application of voltages to the first, second and third electrodes generates electric fields in the piezoelectric material resulting in actuation of the piezoelectric material, or the application of pressure or strain to the diaphragm generates electric potentials at the first, second and third electrodes.
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Bachellerie John R.
Buhler Steven A.
Fitch John S.
Lean Meng H.
Littau Karl A.
Dougherty Thomas M.
Palo Alto Research Center Incorporated
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