Piezoelectric composite materials
First Claim
1. A laminated structural device having the ability to change shape, position and resonant frequency without using discrete motive components comprisingpiezoelectrically active composites laminated together, each of said piezoelectrically active composites containing at least one electrically conductive member, andmeans for selectively placing a predetermined level of charge in said electrically conductive member thereby inducing a distortion in each of said piezoelectrically active composites whereby the device is deformed in a controlled manner.
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Accused Products
Abstract
A laminated structural device has the ability to change shape, position and resonant frequency without using discrete motive components. The laminate (10) may be a combination of layers (14,16) of a piezoelectrically active, non-conductive matrix material as shown in FIG. 1. A power source (22) selectively places various levels of charge an electrically conductive filaments (18,20) imbedded in the respective layers to produce various configurations shown in FIGS. 2 to 5 in a predetermined manner. The layers may be electrically conductive having imbedded piezoelectrically active filaments. A combination of layers of electrically conductive material may be laminated to layers of piezoelectrically active material.
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Citations
8 Claims
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1. A laminated structural device having the ability to change shape, position and resonant frequency without using discrete motive components comprising
piezoelectrically active composites laminated together, each of said piezoelectrically active composites containing at least one electrically conductive member, and means for selectively placing a predetermined level of charge in said electrically conductive member thereby inducing a distortion in each of said piezoelectrically active composites whereby the device is deformed in a controlled manner.
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5. A laminated structural device having the ability to change shape, position and resonant frequency without using discrete motive components comprising
electrically conductive composites laminated together, each of said electrically conductive composites containing at least one piezoelectrically active member, and means for selectively placing a predetermined level of charge in said electrically conductive composites thereby inducing distortion in each of said piezoelectrically active members whereby the device is deformed in a controlled manner.
Specification