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:
Sep. 07, 1999
Filed:
Oct. 31, 1997
Applicant:
Inventors:
A Dean Vender Jagt, Essexville, MI (US);
Gordon Alwin Tooley, Midland, MI (US);
Assignees:
General Motors Corporation, Detroit, MI (US);
Deltamation Corporation, Bay City, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
266239 ; 222595 ;
Abstract
A two-chamber furnace for the low pressure countergravity casting of metal wherein the first chamber is a molten metal supply chamber connected by a submerged orifice closable by a stopper rod valve to a sealed second chamber that is pressurizable to fill a superjacent mold. The stopper rod valve is readily replaceable from the top of the furnace without having to empty the melt from the furnace.