Patent · US Expired

Method and eddy current test probe for the inspection of screws for nuclear reactor pressure vessels

US4788499A · kind A · utility

4Cited by

6References

11Claims

0Family size

Assignee

Kraftwerk Union Aktiengesellschaft · DE

Inventors

Werner Meier · Burlington, US
Edgar Friedrich · Möhrendorf, DE
Erich Modlich · Forchheim, DE

Key dates

Filing date	Nov 6, 1985
Grant date	Nov 29, 1988
Priority date	—
Expiry date	Nov 6, 2005

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/9006
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for the inspection of screws with an eddy current test probe including an insulating material body having a linear contact surface and at least one coil disposed in the body, includes orienting the coil transverse to threads of a reactor pressure vessel setscrew to be inspected, feeding high-frequency alternative current through the at least one coil, generating a coil field covering at least two threads, and guiding the linear contact surface along the threads, and a device for carrying out the method.

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