Patents by Inventor Richard Simerson

Richard Simerson 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).

  • Lost foam casting apparatus for reducing porosity and inclusions in metal castings
    Patent number: 6619373
    Abstract: Apparatus for the gravity-cast, bottom-fill, “lost foam” casting of metal castings, including a fugitive, pyrolizable pattern (for forming a casting cavity), and a hollow sprue (for conducting melt to the casting cavity) embedded in a bed of loose sand. The sprue is free from pyrolyzable foam and conducts melt from above the pattern to a gating system supplying melt to the pattern. The sprue is constructed so as to cause the melt to approach the gating system from beneath and keep any pyrolysis products from entering the sprue.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: September 16, 2003
    Assignee: General Motors Corporation
    Inventors: Gordon Alwin Tooley, Mark Eugene Hoover, June-Sang Siak, Richard Simerson