Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-07-25
2000-05-09
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310328, H01L 4108
Patent
active
060608110
ABSTRACT:
The present invention relates to the mounting of pre-stressed electroactive material in such a manner that large displacement actuators or sensors result. The invention comprises mounting the pre-stressed electroactive material to a support layer. This combination of a pre-stressed electroactive material and support layer may in turn be attached to a mounting surface. The pre-stressed electroactive material may be a ferroelectric, pyroelectric, piezoelectric, or magnetostrictive material. The size, stiffness, mass, and material of the support layer is selected to result in the electroactive device having dynamic response properties, environmental capability characteristics, and the required resilience optimized for a given application. The capacity to connect the support layer to a surface expands the arenas in which the pre-stressed electroactive device may be used. Application for which the invention may be used include actuators, sensors, or as a component in a pumps, switches, relays, pressure transducers and acoustic devices.
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Bryant Robert G.
Copeland, Jr. Benjamin M.
Fox Robert L.
Hellbaum Richard F.
Blackburn Linda B. B.
Dougherty Thomas M.
The United States of America as represented by the United States
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