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:
Dec. 14, 1976
Filed:
Nov. 18, 1974
Herbert C Dill, Houston, TX (US);
Allen E Wisler, Houston, TX (US);
Hughes Tool Company, Houston, TX (US);
Abstract
A method is disclosed for heat treating the weld and heat affected zone between a metal pipe and a metal connector. The overall strength of the assembly in the heat affected zone of the weld is brought to a value higher than, or at least matching, that of the strength of the pipe body in a manner to avoid cracking and to insure that the weld or the heat affected zone does not fail. After welding in the conventional manner, the weld is cooled below the transformation temperature, heated above the critical temperature, quenched at a selected rate that avoids cracking and refines the grain structure, followed by tempering, all of which improve the mechanical properties.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile