Patents by Inventor Stephen Decatur MAXSON

Stephen Decatur MAXSON 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).

  • DEVICE AND METHOD FOR CONTINUOUSLY EXTRUDING TUBING HAVING DIFFERENT MATERIALS
    Publication number: 20210094216
    Abstract: A method of co-extruding material. The method includes controlling the flow of a first extruded material to an infeed of a die by a first plunger positioned in a first material delivery channel; moving the first plunger between a first plunger first position and a first plunger second position, the first plunger creating a vacuum or area of low pressure as the first plunger is moved from the first plunger first position to the first plunger second position; controlling the flow of a second extruded material to the infeed of the die by a second plunger positioned in a second material delivery channel; moving the second plunger between a second plunger first position and a second plunger second position, the second plunger creating a vacuum or area of low pressure as the second plunger is moved from the second plunger first position to the second plunger second position.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 1, 2021
    Inventors: Stephen Decatur MAXSON, Vincent CARTER, Kristopher J. IVIE
  • Device and method for continuously extruding tubing having different materials
    Patent number: 10913194
    Abstract: A co-injection extrusion apparatus and method. The first extruder cooperates with a first material delivery channel for delivering a first material to a die. The second extruder cooperates with a second material delivery channel for delivering a second material to a die. A first plunger is positioned in the first material delivery channel and a second plunger is positioned in the second material delivery channel. The plungers are movable between a first position in which to the plunger is extended in a respective material delivery channel toward the die, and a second position in which the plunger is retracted in the respective material delivery channel away from the die.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: February 9, 2021
    Assignee: GRAHAM ENGINEERING CORPORATION
    Inventors: Stephen Decatur Maxson, Vincent Carter, Kristopher J. Ivie
  • DEVICE AND METHOD FOR CONTINUOUSLY EXTRUDING TUBING HAVING DIFFERENT MATERIALS
    Publication number: 20170291344
    Abstract: A co-injection extrusion apparatus and method. The first extruder cooperates with a first material delivery channel for delivering a first material to a die. The second extruder cooperates with a second material delivery channel for delivering a second material to a die. A first plunger is positioned in the first material delivery channel and a second plunger is positioned in the second material delivery channel. The plungers are movable between a first position in which to the plunger is extended in a respective material delivery channel toward the die, and a second position in which the plunger is retracted in the respective material delivery channel away from the die.
    Type: Application
    Filed: April 5, 2017
    Publication date: October 12, 2017
    Inventors: Stephen Decatur MAXSON, Vincent CARTER, Kristopher J. IVIE