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US Patent 5229979 - Electrostrictive driving device, process for sonic wave projection and polymer materials for use therein
US Patent Issued on July 20, 1993
Estimated Patent Expiration Date:
December 13, 2011Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 13, 2011Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractThe provided invention is a novel electrostrictive driving device which comprises a sonic wave projector element having alternating electrodes and polymer material film layers. The device provides when subjected to a high bias voltage and a superimposed A.C. voltage, a high Angstroms/Volt response. Also, provided is a process for projecting sonic waves using the electrostrictive driving device of this invention. | InventorsApplicationNo. 804705 filed on 12/13/1991US Classes:367/157, Piezoelectric29/25.35, PIEZOELECTRIC DEVICE MAKING310/311, Piezoelectric elements and devices310/334, Acoustic wave type generator or receiver310/800, PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)367/140, SIGNAL TRANSDUCERS367/163With diaphragmField of Search310/800, PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)310/311, Piezoelectric elements and devices310/334, Acoustic wave type generator or receiver367/157, Piezoelectric367/163, With diaphragm367/140, SIGNAL TRANSDUCERS29/25.35PIEZOELECTRIC DEVICE MAKINGExaminersPrimary: Eldred, J. WoodrowAttorney, Agent or FirmUS Patent References3801839, 4257686, Multiple layer piezoelectric wavefront modulatorIssued on: 03/24/1981 Inventor: Albertinetti , et al.4933479Crosslinked polyphosphazenes as piezoelectric materials Issued on: 06/12/1990 Inventor: Kotaka, et al. International ClassH04B 017/00 |
