Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1994-02-22
1994-12-27
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310330, 310331, 347 68, H01L 4108
Patent
active
053768566
ABSTRACT:
A piezoelectric/electrostrictive actuator including a ceramic substrate and piezoelectric/electrostrictive elements is disclosed. The ceramic substrate includes: a spacer plate having a plurality of windows formed in a row in the longitudinal direction of the spacer plate, and auxiliary windows formed adjacent to respective two outermost windows which are located at the opposite ends of the row of the plurality of windows, such that the auxiliary windows sandwich the row of the plurality of windows; and a closure plate superposed on one of opposite major surfaces of the spacer plate, so that the plurality of windows and the auxiliary windows of the spacer plate are closed by the closure plate to provide pressure chambers and enclosed spaces, respectively, within the substrate. The spacer plate and the closure plate are formed from respective ceramic green sheets which are laminated on each other and fired into an integral structure as the ceramic substrate. The piezoelectric/electrostrictive elements are disposed on respective portions of the closure plate which partially define the pressure chambers, respectively, but are not disposed on respective portions of the closure plate which partially define the enclosed spaces corresponding to the auxiliary windows.
REFERENCES:
patent: 3747120 (1973-07-01), Stemme
patent: 3946398 (1976-03-01), Kyser et al.
patent: 4680595 (1987-07-01), Cruz-Uribe et al.
patent: 5289209 (1994-02-01), Suzuki et al.
patent: 5301404 (1994-04-01), Ochiai et al.
patent: 5311218 (1994-05-01), Ochiai et al.
patent: 5311219 (1994-05-01), Ochiai et al.
Masumori Hideo
Takeuchi Katsuyuki
Takeuchi Yukihisa
Budd Mark O.
NGK Insulators Ltd.
Seiko Epson Corp.
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