Layered piezoelectric element realizing stable operating...

Details Layered piezoelectric element realizing stable operating... Layered piezoelectric element realizing stable operating...

2007-03-27

2007-03-27

Dougherty, Tom (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S366000, C347S068000, C347S070000, C347S071000

Reexamination Certificate

active

10493365

ABSTRACT:
A layered piezoelectric element includes a plurality of driving parts divided by grooves and non-driving parts formed at both ends of the array of the driving parts. The driving parts and the non-driving parts include the alternate layers of piezoelectric layers and internal electrodes. The common electrode of the driving parts is extended from the non-driving parts. The capacitance C (F) of each driving part, the number of the driving parts n, and the resistance R (Ω) between the non-driving parts satisfy R≦8×10−6
/C.

REFERENCES:
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patent: 6766817 (2004-07-01), Da Silva
patent: 2002/0008441 (2002-01-01), Nariai
patent: 09300618 (1997-11-01), None
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patent: 2000177120 (2000-06-01), None
patent: 2000325882 (2000-11-01), None
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