Patent · US Expired

Ultrasonic test head

US4751420A · kind A · utility

12Cited by

2References

18Claims

0Family size

Assignee

Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

Wolfgang Gebhardt · Friedrichsthal, DE
Helmut Woll · Sulzbach/Saar, DE

Key dates

Filing date	Nov 5, 1986
Grant date	Jun 14, 1988
Priority date	—
Expiry date	Nov 5, 2006

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB06B1/0685
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An ultrasonic test head including an oscillating crystal (1). A damping body (2) is mounted on the side of the crystal which faces away from the sonic beam direction. The damping body includes a plurality of sound-conducting and sound-absorbing lamellae (3, 5) which are stacked alternately on one another and each have one side thereof coupled to the oscillating crystal (1) thereby providing a high acoustic impedance as well as a high acoustic absorption.

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