Patents by Inventor Jimmy C. Curtis

Jimmy C. Curtis 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).

  • Patent number: 5638959
    Abstract: Solid waste is sorted by passing it through a rotating hollow drum which has sets of extensions, called flights, from the interior wall of the drum, some sets of flights being separated from each other and from the entrance to the drum by blank sections along the drum wall. The first set of flights are knives, so that filled plastic waste bags are opened and emptied. The second set of flights are adjustable magnet strips, lifting and depositing ferrous material onto a conveyor. A ferrous scraper removes ferrous materials, for depositing onto the conveyor. The third set of flights are flexible lifters for lifting and depositing glass, grit and dirt onto another conveyor. A bar screen is positioned over the conveyor to screen out larger materials, clean the lifters, and to be cleaned by the lifters.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: June 17, 1997
    Assignee: National Recovery Technologies, Inc.
    Inventors: Edward J. Sommer, Jr., James A. Kearley, Charles E. Roos, Galen L. Romine, Jimmy C. Curtis