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. 11, 1995
Filed:
May. 18, 1993
Applicant:
Inventor:
Kenneth A Till, Westmont, IL (US);
Assignee:
Liquid Air Corporation, Walnut Creek, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164 661 ; 164259 ; 75709 ; 75 1017 ; 75 1018 ; 266207 ;
Abstract
A process for casting high oxygen affinity metals or metal alloys such as titanium through use of an induction furnace while preventing the pick up of contaminating gas by the metals or metal alloys during melting. An inert shielding gas such as nitrogen or argon or carbon dioxide is introduced as a liquid in a closed environment above the metal or metal alloys being melted such that there is preferably no more than approximately 1% contaminating gas in the gaseous environment proximate the surface of the molten metal or metal alloy. Simultaneously, the mold placed under the induction furnace is purged with a similar or different inert gas.