The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2001
Filed:
Jun. 30, 1997
Petrus Willem van Andel, Amsterdam, NL;
Maarten Lorenz, Amsterdam, NL;
Ricky Eduardo Ricardo Meyer, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
A device is disclosed for inspecting an object of electrically conductive material, in which a non-static-signal transmitter generates an electromagnetic field in the object, and a receiver measures the variations of the eddy current generated by the non-static electromagnetic field and produces a signal representing the decay of the eddy current. The non-static-signal transmitter is provided with at least two laterally spaced-apart emitters for emitting an electromagnetic field, which emitters are, during normal operation, so driven that the resulting electromagnetic field in the central region between the emitters is intensified.