Patents by Inventor Daniel H. Marcellis

Daniel H. Marcellis 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).

  • Method of producing salt cores for use in die casting
    Patent number: 4875517
    Abstract: A pattern, identically proportional in configuration to the salt core to be produced, is initially formed from an evaporable foam material. The evaporable foam pattern is positioned in a mold and surrounded with an unbonded flowable material, such as sand. The pattern is contacted with a molten salt and the high temperature of the salt will vaporize the pattern, with the vapor being captured within the interstices of the sand while the molten salt will fill the void created by vaporization of the foam to provide a salt core identical in configuration to the pattern. The salt core is subsequently used in a high pressure die casting operation to cast a metal part.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: October 24, 1989
    Assignee: Brunswick Corporation
    Inventors: Raymond J. Donahue, Terrance M. Cleary, Frederick M. Hauenstein, Daniel H. Marcellis