Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-03-22
2005-03-22
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R, C310S31300R, C333S195000, C333S194000
Reexamination Certificate
active
06870302
ABSTRACT:
An interdigital transducer hasone-wavelength basic units of a single phase unidirectional transducer a plurality of each having three electrode fingers within one wavelength; anda plurality of one-wavelength basic units of a bidirectional electrode each having four electrode fingers within the one wavelength,wherein the one-wavelength basic units are properly arranged according to a desired filter characteristic, andone of the three electrode fingers of each one-wavelength basic unit of the single phase unidirectional transducer is wider than the two other electrode fingers, andof the four electrode fingers of each one-wavelength basic unit of the bidirectional electrode, one pair of two fingers is interdigitated to the other pair of two fingers, andan adjustment section is provided between the one-wavelength basic units of the single phase unidirectional transducer and the one-wavelength basic units of the bidirectional electrode.
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Matsunami Ken
Nakamura Hiroyuki
Nishimura Kazunori
Aguirrechea J.
Schuberg Darren
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