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:
Oct. 10, 1989
Filed:
Dec. 30, 1987
Applicant:
Inventor:
Frederick Giacobbe, Naperville, IL (US);
Assignee:
American Air Liquide, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 131 ; 21912159 ; 148128 ; 148 16 ; 148 203 ; 148151 ;
Abstract
Workpieces of metal are treated with a high temperature, ambient pressure argon arc plasma system to facilitate surface and through hardening. The argon flame is directed against the outer surface of the rotating workpiece. The surface temperature is monitored by a non contact I.R. temperature sensor and controlled by varying the inert gas flowrate through the plasma generator and/or varying the electrical power input to the plasma generator.