Patents by Inventor William F. Dais

William F. Dais 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).

  • Injector for molding hardenable liquid precursors
    Patent number: 4463881
    Abstract: An injector is provided for injecting hardenable liquid polymer precursors from an accumulator into a mold in a reaction injection molding process. A specially adapted plunger is employed to eject the liquid precursor from an accumulator barrel. The plunger provides a constant fluid-flow relationship between the liquid precursor inlet and the accumulator barrel during its full stroke. The plunger structure prevents the introduction of air and substantially empties the accumulator on each molding cycle.
    Type: Grant
    Filed: December 10, 1981
    Date of Patent: August 7, 1984
    Assignee: General Motors Corporation
    Inventors: William F. Dais, Antoni J. Malarz
  • Grinding wheel tubular support for radial expansion thereof
    Patent number: 4026074
    Abstract: In a grinding wheel assembly of the type having a massive rotating grinding wheel with an inner axial bore subject to expansion with rotation, a tubular support member provides support between the axial bore and support bearing means. The tubular member has an inner central surface in engagement with a race of the bearing means, an outer central surface spaced from the axial bore and outer axial end surfaces shrunk fit into the axial ends of the bore to provide for relative expansion between the wheel and the bearing means.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: May 31, 1977
    Assignee: General Motors Corporation
    Inventors: William F. Dais, Antoni J. Malarz