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:
Nov. 17, 1992
Filed:
Jul. 23, 1990
Applicant:
Inventors:
Min Namkung, Tabb, VA (US);
Peter W Kushnick, Williamsburg, VA (US);
William T Yost, Newport News, VA (US);
John L Grainger, Newport News, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01B / ; G01N / ;
U.S. Cl.
CPC ...
324209 ; 73598 ; 73801 ; 324227 ; 324232 ;
Abstract
The invention is a method and apparatus for characterizing residual uniaxial stress in a ferromagnetic test member by distinguishing between residual stresses resulting from positive (tension) forces and negative (compression) forces by using the distinct and known magnetoacoustic (MAC) and a novel magnetoacoustic emission (MAE) measurement circuit means. A switch permits the selective operation of the respective circuit means.
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Namkung, Min. (1992). Method of characterizing residual stress in ferromagnetic materials (U.S. Patent No. 5164669). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5164669
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