Patent · US Expired

Ultrasonic transducer

US5446332A · kind A · utility

19Cited by

12References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Peter Rapps · Karlsruhe, DE
Peter Knoll · Ettlingen, DE
Franz Pachner · Ubstadt, DE
Martin Noll · Nentershausen, DE
Michael Fischer · Mühlacker, DE

Key dates

Filing date	Jul 28, 1992
Grant date	Aug 29, 1995
Priority date	—
Expiry date	Jul 28, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG10K13/00
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

Several exemplary embodiments for an ultrasound transducer are suggested, in which the sound propagation in the vertical plane is narrow-angled and in the horizontal plane wide-angled by means of appropriate damping measures. The effect on the propagation characteristic is achieved by means of the embodiment in accordance with the invention of the oscillating diaphragm and/or the housing, as well as multiple disposition of piezo oscillators. Because of these measures, damping of the sound waves or the sensitivity of the sensor is approximately the same over the entire horizontal angle up to almost 180.degree..

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