Patent · US Expired

Electrodynamic ultrasonic transducer

US5148414A · kind A · utility

14Cited by

2References

5Claims

0Family size

Assignee

Mannesmann AG · DE

Inventors

Alfred Graff · Essen, DE
Michael Wachter · Lankau, DE

Key dates

Filing date	Nov 1, 1991
Grant date	Sep 15, 1992
Priority date	—
Expiry date	Nov 1, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB06B1/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An electrodynamic ultrasonic transducer, for testing a workpiece, has a pair of spaced permanent magnets, a transducer coil, a concentrator, and a non-ferromagnetic member which partially surrounds the concentrator. In order to concentrate the magnetic lines of flux, the concentrator has a cross-sectional area which is smaller than the cross-sectional area of the adjacent permanent magnets. A transducer coil is acted on by a high frequency transmission pulse, whereby ultrasonics is produced in the workpiece to be tested.

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