Piezoelectric actuators

Electrical generator or motor structure – Dynamoelectric – Reciprocating

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310367, H01L 4108

Patent

active

055593879

ABSTRACT:
Combinations of oppositely poled piezoelectric shapes which, when electrically stimulated, effect increased linear or rotational displacement. In a typical arrangement a length of PVDF piezoelectric material poled in one direction is spatially separated from a second similarly shaped length of PVDF piezoelectric material poled in the opposite direction by an electrically inert substance. When stimulated by an appropriate voltage, one length contracts while the other length expands producing an increased deflection in the combination.

REFERENCES:
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patent: 4304126 (1981-12-01), Yelke
patent: 4330730 (1982-05-01), Kurz et al.
patent: 4469978 (1984-09-01), Hamada et al.
patent: 5344387 (1994-09-01), Lupin
patent: 5410210 (1995-04-01), Sato et al.
patent: 5438553 (1995-08-01), Wilson et al.

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