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:
Apr. 18, 2000
Filed:
Sep. 16, 1998
Harold L Wheaton, Bowerston, OH (US);
PCC Airfoils, Inc., Cleveland, OH (US);
Abstract
An article has a thin wall portion with a thickness of 0.060 inches or less, a width of at least four inches, and a height of at least six inches. In order to cast the article, a pattern having a configuration corresponding to the configuration of the article is covered with a coating of wet ceramic material. In addition, a reinforcing pattern, which is spaced from the portion of the article pattern having a configuration corresponding to the thin wall portion of the article, is covered with the wet ceramic material. Space between the article pattern and reinforcing pattern is filled with the wet ceramic material. A combined mold structure and reinforcing structure are formed by drying the wet ceramic material. The article pattern is removed from the mold structure to leave a mold cavity. Molten metal is conducted into the mold cavity. Force is transmitted from the mold structure to the reinforcing structure to prevent deformation of the mold structure under the influence of force applied against the mold structure by the molten metal.