Patent · US Expired

Sound or ultrasound sensor

US7190105B2 · kind B2 · utility

2Cited by

7References

5Claims

0Family size

Assignee

ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

Rolf Deserno · Maulburg, DE
Helmut Pfeiffer · Steinen, DE

Key dates

Filing date	Apr 9, 2003
Grant date	Mar 13, 2007
Priority date	—
Expiry date	Apr 9, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH04R17/00
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A sound or ultrasound sensor having a radiation characteristic with a preferably small beam angle and producing very little interference signals, including a pot-shaped housing closed at its bottom end by a floor, a piezoelectric element for producing and/or receiving sound or ultrasound through the floor, a matching layer between the piezoelectric element and the floor, and a metal ring gripping around the matching layer with an interlocking fit.

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