Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-11-13
2007-11-13
Martin, J. San (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S365000, C310S366000, C347S070000, C347S071000, C347S072000
Reexamination Certificate
active
11126620
ABSTRACT:
A laminated-type piezoelectric element includes first electrode layers defining individual electrodes, second electrode layers defining common electrodes, and piezoelectric sheets sandwiched between the first and second electrode layers. The first and second electrode layers are laminated alternately. Each individual electrode has a substantially rectangle shape extending in a first direction. The individual electrodes defined in each first electrode layer are arranged at predetermined intervals in a second direction perpendicular to the first direction, to form a row. The common electrode includes a first portion having a band shape. The first portion overlaps the row when viewed in a plan view. The first portion has a pair of edges extending to be perpendicular to a long side of the rectangle shape of each individual electrode. Both ends of each individual electrode in the first direction protrude to outer positions than the edges, when viewed in the plan view.
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Brother Kogyo Kabushiki Kaisha
Martin J. San
Reed Smith LLP
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