Patents by Inventor Elliott Gilbert

Elliott Gilbert 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).

  • Screw extruder with plunger feeder
    Patent number: 7954991
    Abstract: The present invention is directed to a materials extrusion device including a screw extruder with a plunger feeder. It includes a screw extruder having a main housing, a materials advancing screw, a screw drive mechanism, a feed port for inputting materials to be extruded and an extrusion outlet port. It also includes a plunger feeder having an elongated, upwardly biased (non-horizontal) plunger housing, e.g., a cylinder, with a plunger. A plunger drive mechanism is connected to the plunger to move the plunger upwardly and downwardly within the plunger housing, and there is a feed outlet at an upper end of the plunger housing, the feed outlet being connected to the screw extruder feed port.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: June 7, 2011
    Assignee: Leistritz Extrusionstechnik GmbH
    Inventors: Charles Martin, Elliott Gilbert
  • Screw extruder with plunger feeder
    Publication number: 20090123587
    Abstract: The present invention is directed to a materials extrusion device including a screw extruder with a plunger feeder. It includes a screw extruder having a main housing, a materials advancing screw, a screw drive mechanism, a feed port for inputting materials to be extruded and an extrusion outlet port. It also includes a plunger feeder having an elongated, upwardly biased (non-horizontal) plunger housing, e.g., a cylinder, with a plunger. A plunger drive mechanism is connected to the plunger to move the plunger upwardly and downwardly within the plunger housing, and there is a feed outlet at an upper end of the plunger housing, the feed outlet being connected to the screw extruder feed port.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 14, 2009
    Inventors: Charles Martin, Elliott Gilbert