Patents by Inventor Allen Birschbach

Allen Birschbach 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 for the semi-permanent mold casting process
    Patent number: 10682695
    Abstract: A method for casting metal using a semi-permanent mold connected to a feed portion includes forming a coolant jacket in a sprue of the feed portion. A coolant source is connected to the coolant jacket. A metal in a molten state is poured into the feed portion for gravity induced flow into the semi-permanent mold. A wall thickness of the sprue is predetermining which minimizes heat transfer from the sprue, thereby forcing the metal in the molten state to cool slower in the sprue than in the mold. After a predetermined time for the metal to cool to a solid state in the mold, flow of a coolant from the coolant source into the coolant jacket is initiated to cool the metal in the sprue before opening the mold.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: June 16, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David D. Goettsch, Allen Birschbach, Mark Eugene Hoover, Kyle W. Lehrmann
  • METHOD FOR THE SEMI-PERMANENT MOLD CASTING PROCESS
    Publication number: 20190337049
    Abstract: A method for casting metal using a semi-permanent mold connected to a feed portion includes forming a coolant jacket in a sprue of the feed portion. A coolant source is connected to the coolant jacket. A metal in a molten state is poured into the feed portion for gravity induced flow into the semi-permanent mold. A wall thickness of the sprue is predetermining which minimizes heat transfer from the sprue, thereby forcing the metal in the molten state to cool slower in the sprue than in the mold. After a predetermined time for the metal to cool to a solid state in the mold, flow of a coolant from the coolant source into the coolant jacket is initiated to cool the metal in the sprue before opening the mold.
    Type: Application
    Filed: May 7, 2018
    Publication date: November 7, 2019
    Inventors: David D. Goettsch, Allen Birschbach, Mark Eugene Hoover, Kyle W. Lehrmann