Patents by Inventor Glenn A. Ball

Glenn A. Ball 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).

  • Core portion for a tube tire
    Patent number: 4177027
    Abstract: Apparatus includes a rigid mold body and an expandable bladder associated therewith. The bladder is inflatable and expandable to form and press sand core material between itself and the mold body while exerting uniform compressive force over the total surface area of the core material thereby forming a portion of a hollow core of precise external dimension and uniform overall strength. Roll-restraining hoop members can be molded into the sand core at the surface facing the axis of the annulus. A pair of such cores forms a hollow core with two sets of hoops on which a tube-tire is formed.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: December 4, 1979
    Assignee: Caterpillar Tractor Co.
    Inventors: Charles E. Grawey, Glenn A. Ball, Donald G. Zook
  • Method of making a portion of an hollow, annular, sand-core
    Patent number: 3998918
    Abstract: Method of making an annular sand core portion by shaping sand and binder in an annular mold with an inflatable bladder. The bladder is inflatable and expandable to form and press sand core material between itself and the mold body while exerting uniform compressive force over the total surface area of the core material thereby forming a portion of a hollow core of precise external dimension and uniform overall strength.
    Type: Grant
    Filed: January 16, 1976
    Date of Patent: December 21, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Charles E. Grawey, Glenn A. Ball, Donald G. Zook