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. 21, 1999
Filed:
Jul. 08, 1997
Applicant:
Inventor:
Akira Mitsuhashi, Omiya, JP;
Assignee:
Mitsubishi Materials Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
1641221 ; 164126 ; 164348 ;
Abstract
A casting furnace for forming a large size turbine blade at a high casting rate using a casting alloy which has a single crystal structure or a columnar crystal structure, includes a main tank 2 in which a mold M is placed. A heater 6 heats the periphery of a mold M to a predetermined temperature. The heater is then vertically raised relative to the mold M while a cooling liquid metal immerses and cools the periphery of the heated mold M below the heater. The surface height of the cooling liquid metal is raised according to the rising of the heater.