Patents by Inventor Leonard Ervin

Leonard Ervin 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).

  • Die casting in investment mold
    Publication number: 20070137827
    Abstract: Method and apparatus for casting a metallic material involves the steps of providing a non-metallic mold in a mold-receiving chamber disposed in at least one of relatively movable first and second members, communicating a mold cavity in the mold to a gating passage disposed in at least one of the first and second metallic members, communicating the gating passage to a shot sleeve, and flowing metallic material from the shot sleeve to the gating passage and into the non-metallic mold.
    Type: Application
    Filed: December 19, 2005
    Publication date: June 21, 2007
    Inventors: Russell Vogt, David Lee, George Wolter, Leonard Ervin