Torsional electrostrictive actuators

Details Torsional electrostrictive actuators Torsional electrostrictive actuators

1997-10-31

2000-02-01

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310337, 310358, 310369, H01L 4108

Patent

active

060206748

ABSTRACT:
A torsional actuator includes a plurality of segments, each segment having a substantially rectangular shape. Each segment is comprised of an electroactive material that is poled along an elongated dimension of the rectangular shape. The segments are arranged side-by-side, with adjacent segments poled in opposing directions along their long dimensions. Conductors are positioned between adjacent sides of the side-by-side segments, with all of the juxtaposed segments being bound together in an integral structure. A power supply is connected to the conductors and applies oppositely poled electric fields across adjacent segments to cause like shear deformations of each of the segments and a resultant angular rotation of a non-fixed end thereof.

REFERENCES:
patent: 2828470 (1958-03-01), Mason
patent: 2838695 (1958-06-01), Thurston
patent: 2838696 (1958-06-01), Thurston
patent: 2880334 (1959-03-01), Mason
patent: 3035126 (1962-05-01), Crownover
patent: 3219850 (1965-11-01), Langevin
patent: 3842294 (1974-10-01), Doi et al.
patent: 4025805 (1977-05-01), Coltma
"Piezoelectric Torsional Actuator", Fuda et al., Ferroelectrics, vol. 160, pp. 323-330 (1994).

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