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. 24, 2010
Filed:
Aug. 07, 2007
Umberto Aprile, Rueil Malmaison, FR;
Jean-claude Jacques Giral, Eaubonne, FR;
Bernard Louis Lallement, Eaubonne, FR;
Jean-louis Martial Verger, Bondy, FR;
Umberto Aprile, Rueil Malmaison, FR;
Jean-Claude Jacques Giral, Eaubonne, FR;
Bernard Louis Lallement, Eaubonne, FR;
Jean-Louis Martial Verger, Bondy, FR;
SNECMA, Paris, FR;
Abstract
A process for manufacturing at least one single-crystal seed that can be used as a starter seed in the manufacture of a single-crystal high-pressure turbine nozzle, with at least one vane between two platforms, by metal casting, is disclosed. The process includes producing a wax pattern that includes a pattern for the nozzle, a pattern for the starter seed, and a pattern for a crude seed; forming a ceramic shell mold from the wax pattern; incorporating a starter seed into the mold; pouring metal into the mold; directionally solidifying the metal in the mold from the starter seed; and separating the crude seed from the nozzle. The starter seed and the crude seed each include a flat face for localizing the crystalline orientations. The crude seed has the same crystallographic structure as the nozzle.