Patent · US Expired

Positioning element with a piezo-ceramic body

US4423347A · kind A · utility

16Cited by

10References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter Kleinschmidt · Munich, DE
Hans Meixner · Haar, DE
Valentin Magori · Gernsheim, DE

Key dates

Filing date	Dec 8, 1981
Grant date	Dec 27, 1983
Priority date	—
Expiry date	Dec 8, 2001

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/02
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.