Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-06-18
2009-11-10
Budd, Mark (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S334000, C310S358000
Reexamination Certificate
active
07615912
ABSTRACT:
An electroacoustic transducer having a tail mass, a head mass and at least two parallelepiped shaped piezoelectric material elements disposed between and attached to the tail mass and the head mass is provided. The tail mass has a body extending between a first end and a second end, the body having a cavity with a cavity wall and the cavity extending from the first end towards the second end. The head mass has a head and an elongated shaft attached to and extending from the head, the shaft having a shaft axis and being located at least partially within the cavity of the tail mass. The at least two parallelepiped shaped piezoelectric material elements are made from a piezoelectric material having a non-zero d3yshear piezoelectric coefficient where the d3ycoefficient can be d34, d35or d36.
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Pengdi Han et al.; Cut Directions For The Optimization of Piezoelectric Coefficients of Lead Magnesium Niobate-Lead Titanate Ferroelectric Crystals; Applied Physics Letters 86; (2005); pp. 052902-1-052902-3.
Meyer, Jr. Richard J.
Van Tol David J.
Budd Mark
Glifford, Krass, Sprinkle, Anderson & Citkowski, P.C.
The Penn State Research Foundation
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