Patents by Inventor William Crombie

William Crombie 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).

  • Twin rotary drum tire manufacturing unit
    Patent number: 4753707
    Abstract: A tire manufacturing unit having two tire building drums mounted on respective coaxial and independent half shafts butt connected in a rotary manner so as to define a single continuous shaft supported in a rotary manner on a platform mounted for rotation in successive 180.degree. steps about a horizontal axis; each half shaft having a respective independent driving device, and one of the drums moving, during each rotation step of the platform, between a first and second work position, through a cavity formed in the platform supporting base.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: June 28, 1988
    Assignee: The Firestone Tire & Rubber Company
    Inventor: William Crombie