Polymer film composite transducer

Details Polymer film composite transducer Polymer film composite transducer

2005-09-20

2005-09-20

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S800000

Reexamination Certificate

active

06946777

ABSTRACT:
A composite piezoelectric transducer, whose piezoeletric element is a “ribbon wound” film of piezolectric material. As the film is excited, it expands and contracts, which results in expansion and contraction of the diameter of the entire ribbon winding. This is accompanied by expansion and contraction of the thickness of the ribbon winding, such that the sound radiating plate may be placed on the side of the winding.

REFERENCES:
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patent: 4435667 (1984-03-01), Kolm et al.
patent: 5153859 (1992-10-01), Chatigny et al.
patent: 5321332 (1994-06-01), Toda
patent: 5438553 (1995-08-01), Wilson et al.
patent: 5559387 (1996-09-01), Beurrier
patent: 6437489 (2002-08-01), Shinke et al.

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