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:
Apr. 14, 2009
Filed:
Jan. 25, 2005
Steen Arnfred Nielsen, Jyllinge, DK;
Alexander Bardenshtein, Hedehusene, DK;
Niels Kloppenborg Laursen, Rosklide, DK;
Steen Arnfred Nielsen, Jyllinge, DK;
Alexander Bardenshtein, Hedehusene, DK;
Niels Kloppenborg Laursen, Rosklide, DK;
Force Technology, Brondby, DK;
Banestyrelsen, Copenhagen O, DK;
Abstract
A method of detecting defects in a railway track rail, the rail () having a longitudinal centre plane and a surface, the surface including a running surface (), the method comprising directing an excitation laser beam () to an excitation position () on the surface of the rail () to induce an ultrasonic wave in the rail (); and directing a detection laser beam () to a detection position () on the surface of the rail () to detect at least one predetermined property of the induced ultrasonic wave; wherein the excitation position () and the detection position () are located on the running surface () and displaced from the longitudinal centre plane of the rail ().