Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-03-28
2006-03-28
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S334000, C310S322000, C367S162000, C367S163000, C367S155000, C367S157000, C381S114000, C381S190000
Reexamination Certificate
active
07019439
ABSTRACT:
A transducer assembly for receiving a stimulating signal and producing ultrasound therefrom at one or more frequencies, over an ultrabroad bandwidth at each frequency, includes a front mass disposed about a central axis, and a back mass disposed about the central axis, laterally offset from the front mass. The transducer assembly also includes one or more resonators disposed about the central axis and between the front mass and the back mass, including at least one electrical contact for receiving the stimulating signal. The back mass consists of a low-density material, such as aluminum, aluminum alloy, magnesium, or magnesium alloy, or any of various low-density materials known in the art. In general, the back mass is characterized by a density of less than 6.0 g/cc. In one embodiment, the front mass and the back mass are made from different materials, and the front mass includes a deviation from symmetrical symmetry.
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International Search Report.
DeCastro Eugene A.
Johnson Benjamin R.
Phaneuf Eugene
Piazza Timothy W.
Aguirrechea J.
Blackstone-Ney Ultrasonics, Inc.
Greenberg & Traurig, LLP
Schuberg Darren
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