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. 28, 2019
Filed:
Jan. 27, 2015
Luxembourg Patent Company S.a., Lintgen, LU;
Stephan Sellen, Wehingen, DE;
Philippe Schmitz, Steinsel, LU;
Luxembourg Patent Company S.A., Lintgen, LU;
Abstract
The invention is directed to a method for improving the mechanical behavior of a metallic body () comprising an internal volume for a fluid and at least one threaded connecting port () to said internal volume, the method comprising a step of treatment by autofrettage of the internal volume by applying a pressure to a liquid inside said volume. The autofrettage step comprises closing the internal volume by screwing a plug () to each the at least one threaded connecting port (), so that the thread(s) of said port(s) is/are also subject to the autofrettage treatment. The invention is also directed to a body () resulting from such a treatment, with compressive stresses at the root of one of the most carrying turns of the thread of each of the connecting ports. The compressive stresses improve the fatigue behavior of the body.