Laminated piezoelectric actuator

Details Laminated piezoelectric actuator Laminated piezoelectric actuator

1991-11-13

1993-05-04

Stephan, Steven L.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310348, 310366, H01L 4104, H01L 4108, H01L 4109

Patent

active

052085066

ABSTRACT:
A laminated piezoelectric actuator includes a plurality of electrostrictive elements which are connected with each other. Each element 1 is a structure alternately laminated with electrostrictive material layers and internal electrode layers. The elements are sealed in an enclosure consisting of a metallic casing 5 with at least one metallic member 3 and 6 fixed to an aperture of the casing 5. The actuator has a supporting member 7 for connecting and positioning the elements 1 in their longitudinal displacing direction. The supporting member 7 has a notch formed on its opposed lateral surfaces which provides an exit for leads connected to the plurality of electrostrictive affect elements. In the actuator, even if the voltage is repeatedly turned on and off, the electrostrictive material layer will not crack and the connecting portion cannot slip off.

REFERENCES:
patent: 2434043 (1948-01-01), Kershaw
patent: 4011474 (1977-03-01), O'Neill
patent: 4408832 (1983-10-01), Hartman
patent: 4454441 (1984-06-01), Taniguchi
patent: 4781477 (1988-11-01), Nagasawa
patent: 4849668 (1989-07-01), Crawley et al.
patent: 4958100 (1990-09-01), Crawley et al.

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