Patents by Inventor David R. Erny

David R. Erny has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Core and pattern manufacture for investment casting
    Publication number: 20030015308
    Abstract: Method and apparatus for making a ceramic core or fugitive pattern for use in investment casting wherein a fluid ceramic core or pattern material is introduced into a molding cavity defined by cooperating dies, and at least a region of one or both of the dies is heated during filling of the molding cavity with the material and then cooled to a lower ejection temperature before removal of a ceramic core or pattern from the molding cavity.
    Type: Application
    Filed: July 23, 2001
    Publication date: January 23, 2003
    Inventors: Ken E. Fosaaen, Jeffery S. Smith, David R. Erny, Robert M. Shay, Nick G. Lirones