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. 27, 2011
Filed:
Apr. 14, 2009
Applicants:
Max Eric Schlienger, Napa, CA (US);
Paul Anthony Withey, Derby, GB;
Inventors:
Max Eric Schlienger, Napa, CA (US);
Paul Anthony Withey, Derby, GB;
Assignee:
Rolls-Royce Corporation, Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D 37/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of initiating a pour of a liquid alloy comprises the steps of filling an interior of a crucible with a displacement plunger and the liquid alloy until a metal head of the liquid alloy exceeds a critical height. The crucible has a bottom pour opening with a plug inserted therein. The plug is configured to be buoyant within the liquid alloy when the liquid alloy is below the critical height. Pour is initiated by at least partially withdrawing the displacement plunger until the metal head drops below the critical height.