Patent · US Expired

Piezoelectric valve

US6715731B1 · kind B1 · utility

45Cited by

13References

21Claims

0Family size

Assignee

FESTO AG & CO. · US

Inventors

Peter Post · Esslingen am Neckar, DE
Jürgen Gerhartz · Eßlingen, DE
Reiner Bindig · Bindlach, DE

Key dates

Filing date	Apr 24, 2002
Grant date	Apr 6, 2004
Priority date	—
Expiry date	Oct 15, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/8242
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A directly actuated electric valve is proposed that has a piezoelectric drive unit (3) for direct actuation of a valve member (2). The piezoelectric drive unit (3) contains, extending transverse to the displacement direction of valve member (2), at least one piezo-flexural element (8, 8′), which acts on valve member (2) at one end and is mounted stationary with respect to the housing at the other, such that its electrically induced flexural motion produces the linear displacement motion of valve member (2). Such a configuration permits very short switching times with compact dimensions.

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