Piezoelectric flexural transducer and use thereof

US6747400B2 · kind B2 · utility

Assignees

• FESTO AG & CO. · US
• Siemens Aktiengesellschaft · DE

Inventors

• Martin Maichl · Salach, DE
• Markus Hoffmann · Wolfschlugen, DE
• Michael Weinmann · Schorndorf, DE
• Michael Riedel · Buchbach, DE
• Karl Lubitz · Ottobrunn, DE
• Andreas Schmid · Kleinmachnow, DE

Key dates

• Filing date: May 12, 2003
• Grant date: Jun 8, 2004
• Expiry date: May 12, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/50

Abstract

A piezoelectric flexural transducer having an elongated support body (2) which on at least one longitudinal side is provided with a piezoelectric unit (5). The piezoelectric unit (5) has one or more piezoelectric material layers (12) and electrodes (13a and 13b) associated with same. Furthermore, the piezoelectric unit (5) includes an electrically insulating coating surrounding the body (8) right round it, the section (26) of the coatings lying between the piezoelectric body (8) and the support body (2) being provided with one or more electrically conductive vias (27a and 27b). The latter provide the necessary electrical connection between the electrodes (13a and 13b) and the support body (2).