Piezoelectric actuators
May 13, 2014. Estimated 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.Patent References 3225226 3315103 3781955 Electroacoustic conversion device having a diaphragm comprising at least one of a piezoelectric polymer material Piezoelectric fluid-electric generator Spiral piezoelectric rotary actuator Electrode arrangement for a folded polymer piezoelectric ultrasonic detector Piezoelectric polymer micromanipulator Increased sensitivity piezoelectric hydrophones Printer device with noise reducing impact hammer InventorApplicationNo. 242618 filed on 05/13/1994US Classes:310/328, With mechanical energy coupling means310/331, Plural elements310/800PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)ExaminersPrimary: Dougherty, Thomas M.Attorney, Agent or FirmForeign Patent References
International ClassH01L 041/08AbstractCombinations of oppositely poled piezoelectric shapes which, when electrically stimulated, effect increased linear or rotational displacement. In a typical arrangement a length of PVDF piezoelectric material poled in one direction is spatially separated from a second similarly shaped length of PVDF piezolectric material poled in the opposite direction by an electrically inert substance. When stimulated by an appropriate voltage, one length contracts while the other length expands producing an increased deflection in the combination. | |
