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:
Aug. 20, 1991
Filed:
Aug. 29, 1989
Applicant:
Inventor:
Lloyd E Hackman, Worthington, OH (US);
Assignee:
Ribbon Technology Corporation, Gahanna, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
266 87 ; 222592 ; 266275 ;
Abstract
The invention relates to a method and apparatus for controlling the temperatures of a plurality of zones of a casting hearth or vessel. The invention also relates to a method for controlling the thickness of the solidified skull of castable material in the casting hearth or vessel. By the present invention, the efficiency of the skull casting process can be significantly improved by reducing the thickness of the skull and thereby increasing the amount of castable material which can remain molten and pourable.