Patent · US Expired

Piezoelectric actuator for positioning with heat dissipating inactive end section

US6495946B1 · kind B1 · utility

4Cited by

19References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rudolf Heinz · Renningen, DE
Bertram Sugg · Gerlingen, DE
Friedrich Boecking · Stuttgart, DE

Key dates

Filing date	Feb 7, 2001
Grant date	Dec 17, 2002
Priority date	—
Expiry date	Feb 7, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M63/0026
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piezoelectric actuator is described, for example for actuating a mechanical component, in which a piezoelectric element that produces tensile or compressive force acting on an actuation element is provided. The piezoelectric element has a multi-layer structure of piezoelectric layers with internal electrodes (2, 3) disposed between them. The contacting of the internal electrodes (2, 3) on alternate sides takes place by means of external electrodes (10, 11). External electrical connections (12) for the lateral contacting are affixed to an inactive end region (4, 5, 6, 7; 13, 14) in the multi-layer structure, which has a heat-conducting core (5; 14) with a favorable heat conductivity.

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