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:
Jan. 04, 1994
Filed:
Dec. 12, 1991
Jurgen Wortmann, Weichs, DE;
Robert Wege, Munich, DE;
Fritz Staub, Seuzach, CH;
Bruno Walser, Schottiken, CH;
Sulzer-MTU Casting Technology GmbH, Munich, DE;
Abstract
A process and apparatus for the production of a single-crystal article, such as a turbine blade, by casting a molten metal into a casting mold with a single crystal seed crystal at the bottom of the casting mold. The casting mold is heated and vacuum-purified after which the seed crystal is introduced into an opening at the bottom of the mold in a matter of a few seconds whereafter the molten metal is immediately cast onto the seed crystal in the casting mold. The seed crystal is carried by a holder which is lifted to bring the seed crystal into the open bottom of the casting mold in sealed relation in the mold.