Piezoceramic bending transducer and use thereof

US6762536B2 · kind B2 · utility

Assignees

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

Inventors

• Markus Hoffmann · Wolfschlugen, DE
• Karl Lubitz · Ottobrunn, DE
• Michael Riedel · Buchbach, DE
• Michael Weinmann · Schorndorf, DE

Key dates

• Filing date: Oct 10, 2002
• Grant date: Jul 13, 2004
• Expiry date: Nov 17, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B06B2201/70
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A piezoelectric bending transducer includes a support body, a stack of piezo-ceramic layers, arranged thereon and flat electrodes arranged between the layers. On the side of the support body facing the stack, an adaptation layer is arranged with essentially the same coefficient of expansion as the piezo-ceramic. The bending transducer displays a good actuating power and a low thermal natural distortion with economical production costs. The transducer is particularly suitable for application in a valve.