Patents by Inventor Frank H. Doyal, II

Frank H. Doyal, II 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).

  • Composite piston
    Patent number: 4306489
    Abstract: A composite piston for internal combustion engines is provided. The base structure of the piston is formed from a fiber-reinforced resin material. Covering the head portion of the base structure and integral therewith is a cap portion formed of a nonflammable material such as metal, metal alloys and ceramics. The cap and head portion of the piston have an outer diameter which is less than the outer diameter of the piston body by an amount sufficient to accommodate for the difference in the thermal coefficient of expansion of the material of the cap and the material of the base structure.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: December 22, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Howard D. Driver, Frank H. Doyal, II