Positioning element with a piezo-ceramic body

Details Positioning element with a piezo-ceramic body Positioning element with a piezo-ceramic body

1981-12-08

1983-12-27

Wong, Peter S.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 310326, 310355, H01V 700

Patent

active

044233477

ABSTRACT:
An electrically actuated positioning element system utilizes a positioning element formed of piezo-electrical bodies each formed of a plurality of lamellae having electrodes. The lamellae have a length substantially greater than their thickness and upon application of an electrical voltage with a field direction which promotes a polarization of the material of the lamellae, the body is shortened. The two bodies are connected to one another at one end by a cross arm and at the other end the one body end is active and free to move relative to the other body end such that a resultant relative motion occurring between the two body ends may be utilized. Preferably a connection is provided for absorbing a lateral thrust of the bodies. The two piezo-electrical bodies are each electrically connected to one another for reverse-phase operation such that one contracts while the other is in a lengthened condition and vice versa.

REFERENCES:
patent: 3154700 (1964-10-01), McNaney
patent: 3500799 (1970-03-01), Benson
patent: 3748503 (1973-07-01), Cobarg et al.
patent: 3760203 (1973-09-01), Guntersdorfer
patent: 3835338 (1974-09-01), Martin
patent: 3911298 (1975-10-01), Borsdorf
patent: 3916373 (1975-10-01), Schroder
patent: 4023162 (1977-05-01), Murakami
patent: 4188645 (1980-02-01), Ragle et al.
patent: 4228440 (1980-10-01), Horike et al.
Industrial Research, vol. 4, 1978, "Serving the $76-Billion World-Wide R & D Industry".
Spanner et al., "Feinste Positionierungen mit Piezo-Antrieben", Feinwerktechnik & Messtechnik, (1979), pp. 181-183.

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