Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-07-13
2008-11-04
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S330000, C310S331000
Reexamination Certificate
active
07446459
ABSTRACT:
A hybrid piezoelectric energy harvesting transducer system includes: (a) first and second symmetric, pre-curved piezoelectric elements mounted separately on a frame so that their concave major surfaces are positioned opposite to each other; and (b) a linear piezoelectric element mounted separately on the frame and positioned between the pre-curved piezoelectric elements. The pre-curved piezoelectric elements and the linear piezoelectric element are spaced from one another and communicate with energy harvesting circuitry having contact points on the frame. The hybrid piezoelectric energy harvesting transducer system has a higher electromechanical energy conversion efficiency than any known piezoelectric transducer.
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Hyeoung Woo Kim, et al., “Energy Harvesting Using a Piezoelectric “Cymbal” Transducer . . . ”, Japanese Journal of Applied Physics, vol. 43, No. 9A, 2004, pp. 6178-6183, The Japan Society of Applied Physics, published Sep. 9, 2004.
Hackenberger Wesley S.
Jiang Xiaoning
Rehrig Paul W.
Su Ji
Xu Tian-Bing
Chasteen Kimberly A.
Gibbens Barry V.
Helfrich George F.
National Institute of Aerospace Associates
Rosenau Derek J
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