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:
May. 15, 2007
Filed:
Oct. 07, 2004
John B. Nestleroth, Westerville, OH (US);
Richard J. Davis, Iii, Columbus, OH (US);
Ronnie D. Gallliher, Baltimore, OH (US);
George N. Brand, Columbus, OH (US);
John B. Nestleroth, Westerville, OH (US);
Richard J. Davis, III, Columbus, OH (US);
Ronnie D. Gallliher, Baltimore, OH (US);
George N. Brand, Columbus, OH (US);
Battelle Memorial Institute, Columbus, OH (US);
Abstract
A apparatus for pipeline integrity monitoring comprising a magnetically permeable backing bar and at least three magnets comprising a relatively medium-strength magnet positioned at one end of the backing bar, a relatively low-strength magnet positioned at the other end of the backing bar, and a relative high-strength magnet positioned between the medium-strength and the low-strength magnet. The at least three magnets are adapted and positioned to induce a plurality of resultant fields within the pipeline wall comprising a first resultant field suitable for detecting a reduced metal-related anomaly and a second resultant field suitable for detecting a mechanically worked-related anomaly. Preferably, the first resultant field has a strength greater than 120 Oersted and the second resultant field has a strength between 40 and 80 Oersted.