Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2011-03-29
2011-03-29
SanMartin, J. (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S328000, C310S800000
Reexamination Certificate
active
07915792
ABSTRACT:
An actuator includes a spirally rolled cylindrical sheet body. The sheet body is formed by attaching an electrode on each side of a dielectric elastomer layer. When a voltage is applied to the electrodes, the sheet body is contracted along the direction of its thickness, and expanded in directions perpendicular to its thickness. The actuator is actuated by applying a voltage to the electrodes and stopping the voltage application, so that the cylindrical sheet body is extended and contracted along the direction of the axis. The material forming the dielectric elastomer layer has a low strain region, where the value of a strain based on a stress acting on the dielectric elastomer layer varies from zero to a value that is greater than and close to zero, and a high strain region, where the value of the strain is greater than that in the low strain region. The Young's modulus in the low strain region is less than the Young's modulus in the high strain region.
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Jones, R.W. et al., Dielectric Elastomers and Compliant Metal Electrode Technology, IEEE 2010 pp. 368-373.
Kobayashi Toru
Ruslim Christian
Suda Junko
Takeuchi Hiromitsu
Zhao Changming
Posz Law Group , PLC
SanMartin J.
Toyoda Gosei Co,., Ltd.
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