Patent · US Expired

Piezo valve

US6581638B2 · kind B2 · utility

21Cited by

8References

24Claims

0Family size

Assignee

FESTO AG & CO. · US

Inventors

Herbert Frisch · Wien, AT
Hannes Wirtl · Schongau, DE
Michael Weinmann · Schorndorf, DE
Martin Maichl · Salach, DE

Key dates

Filing date	Nov 20, 2001
Grant date	Jun 24, 2003
Priority date	—
Expiry date	Nov 20, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87241
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piezo valve having a flexural transducer unit which includes two flexural transducers adapted to be deflected in opposite directions. The flexural transducers are fixedly joined together at one terminal part of the flexural transducer unit with the formation of a common bearing section. The flexural transducer unit is pivotally mounted in relation to the housing. At least one flexural transducer serves for the control of a valve opening associated with it, the other flexural transducer being able to be biased by the application of a drive voltage toward a support face arranged in a deflection path in order to for instance to increase the displacement path of the other flexural transducer.

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