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:
Jul. 10, 1979
Filed:
Nov. 25, 1977
Applicant:
Inventors:
Herbert C Dill, Houston, TX (US);
Allen E Wisler, Houston, TX (US);
Assignee:
Hughes Tool Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
266252 ; 266258 ; 266259 ;
Abstract
Apparatus for heat treating the weld and heat affected zone between a steel pipe and a steel connector, the apparatus including an induction coil to heat the weld and weld heat affected zone to a selected temperature. A ring shaped manifold having nozzle means to direct flow outwardly is connected with pumping means to pump gas simultaneously against the interior and exterior of the weld and heat affected zone.