Piezoelectric transducers

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

Reexamination Certificate

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C310S331000

Reexamination Certificate

active

06987348

ABSTRACT:
A system and method of operation for a piezoelectric transducer is described which utilizes a mesa structure interposed between a piezoelectric material element and a chamber diaphragm. The system can be used as a sensor where a net motion to the diaphragm causes a net charge equal to the sum of the charges on each piezoelectric diaphragm. Alternatively, the system can be used as an actuator wherein an applied voltage causes movement of the piezoelectric transducer and the chamber diaphragm.

REFERENCES:
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patent: 6257700 (2001-07-01), Aihara et al.
patent: 6476336 (2002-11-01), Takeuchi et al.
patent: 6495945 (2002-12-01), Yamaguchi et al.
patent: 6584660 (2003-07-01), Shimogawa et al.
patent: 6734603 (2004-05-01), Hellbaum et al.
patent: 6767084 (2004-07-01), Moriya et al.
patent: 6802597 (2004-10-01), Furuhata
patent: 0 787 588 (1997-08-01), None
patent: 0 803 918 (1997-10-01), None
European Search Report for EPO Counterpart Application No. EP 03 028 768.4 Jul. 14, 2004.

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