Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2000-05-22
2001-07-03
Mayes, Curtis (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S089140, C156S196000, C156S258000, C264S633000, C310S367000
Reexamination Certificate
active
06254708
ABSTRACT:
BACKGROUND OF THE INVENTION
Piezoelectric ceramic/polymer composites are combined within a polymer matrix to produce a flat tape cast sheet of ceramic material. The flat tape cast sheets can be shaped to form a cylinder, cone or other linear dependent shape for providing a shaped transducer from the flat tape cast sheet. The resulting transducer is limited to shapes which must be linearly dependent. The fabrication methods of the piezoelectric ceramic used in making these composites do not conform to nonlinear dependent geometries. It would be desirable to provide a shape forming process that allows multi-laminates of flat tape cast materials which conform to nonlinear dependent geometries such as hemispheres and to produce a multi-laminate nonlinear dependent shape formed transducer using this process. With such a process the shape of the transducer can be optimized in accordance with a particular application.
BRIEF SUMMARY OF THE INVENTION
A shape formed multi-laminate transducer which conforms to nonlinear dependent shaped geometries and the shape forming process for producing the nonlinear dependent shaped multilaminate transducer is presented. The shape forming process includes the cutting of the tape cast material to a predetermined two-dimensional shape and then pressing the cut material to form the desired three-dimensional nonlinear dependent shape. After shape forming, the sample is sintered, metalized, poled, and made into an acoustical device such as a transducer. The production of such a device by using tape cast material allows designers to easily vary the shape of the product as well as to be able to vary the properties within simply by exploiting the lamination method associated with tape casting. As such, a designer is able to design and manufacture a transducer optimized to meet the requirements of a particular application.
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Desy, Jr. Louis J.
Mayes Curtis
Weingarten, Schurgin Gagnebin & Hayes LLP
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