Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1988-07-06
1990-02-13
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310358, 310359, 310366, H01L 4108
Patent
active
049009702
ABSTRACT:
An energy trapping type piezoelectric resonance device utilizing the mode of thickness extensional vibration comprises a plate-shaped body of a piezoelectric material and three or more electrodes provided to be opposed to each other through peizoelectric material layers in the direction of thickness of the body. At least one of the electrodes is provided to be smaller in area than the major surfaces of the body, to be capable of energy trapping.
REFERENCES:
patent: 3433982 (1969-03-01), Kaname et al.
patent: 3590287 (1971-06-01), Berlincourt et al.
patent: 4087716 (1978-05-01), Heywang
patent: 4564782 (1986-01-01), Ogawa
patent: 4649313 (1987-03-01), Ogawa et al.
patent: 4652784 (1987-03-01), Inoue et al.
patent: 4742264 (1988-05-01), Ogawa
Ando Akira
Fujishima Satoru
Kittaka Toshihiko
Sakabe Yukio
Budd Mark O.
Murata Manufacturing Co. Ltd.
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