Patents by Inventor James M. Rothgery

James M. Rothgery 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).

  • Drop door control for internal mixer
    Patent number: 5492403
    Abstract: A method and apparatus for controlling the discharge of an elastomeric material from a high intensity mixing machine having a mixing chamber with two rotors and an outlet with a drop door. The drop door is open when the rotors are in a predetermined preferred position for unloading the mixing machine in response to the positions of indicators on the rotor shafts. Sensors mounted in the wall of the outlet determine when the gate is clear after unloading of the mixed elastomeric material whereby the drop door may be moved into the outlet for closing of the mixing chamber as soon as the unloading is completed.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: February 20, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John D. Metcalf, John W. Price, Jr., James M. Rothgery, Ronald J. Zaucha