Patent · US Expired

Ultrasonic probe for measuring liquids at high temperature and under high pressure

US4196631A · kind A · utility

9Cited by

3References

5Claims

0Family size

Assignee

OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES · FR

Inventors

Alain Deom · Cachan, FR
Jean-Claude J. Demarais · Verrières-le-Buisson, FR

Key dates

Filing date	Feb 6, 1979
Grant date	Apr 8, 1980
Priority date	—
Expiry date	Feb 6, 1999

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/02836
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An ultrasonic probe for measuring liquids at high temperature and under high pressure. The ultrasonic probe comprises a leak-tight protective sleeve which has an end face closed by a thin metallic wall. The protective sleeve contained internal elements which are in particular a transducing piezoelectric plate and a damping cylinder. The piezoelectric element has one face which is in mechanical and electrical contact with the internal face of the thin sleeve wall and the other face which is supported on a damping cylinder. The thin sleeve wall of the sleeve end face is constituted by a metallic layer obtained by cathodic sputtering.

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