Patents by Inventor Roger L. Almond

Roger L. Almond 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).

  • Counter-gravity casting mold
    Patent number: 4632171
    Abstract: A thin-walled, resin-bonded sand, shell mold for the vacuum counter-gravity casting of metal comprising cope and drag halves glued together at a parting line therebetween. The drag includes a flange extending beyond the periphery of the cope which flange has an upper sealing surface formed by a drag-shaping pattern for effecting a seal with the mouth of the vacuum chamber used to fill the mold.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: December 30, 1986
    Assignee: General Motors Corporation
    Inventor: Roger L. Almond