Advanced layered composite polylaminate electroactive actuator and sensor
July 25, 2017. 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 3569749 3728562 3816774 Curved polymeric piezoelectric electro-acoustic transducer Shear type prestressed piezoelectric force transducer Shielded piezoelectric acoustic pickup for mounting on musical instrument sounding boards Ultrasound transducer having astigmatic transmission/reception characteristic Transformed stress direction acoustic transducer Method and apparatus for structural, actuation and sensing in a desired direction Method for making monolithic prestressed ceramic devices InventorsAssigneeApplicationNo. 910463 filed on 07/25/1997US Classes:310/311, Piezoelectric elements and devices310/328With mechanical energy coupling meansExaminersPrimary: Dougherty, Thomas M.Attorney, Agent or FirmInternational ClassH01L 041/08AbstractThe 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.Other References
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