Patents by Inventor Ralph E. Gerstung

Ralph E. Gerstung 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).

  • System and filter for preventing contamination of particulate material in railroad car during transportation and unloading
    Patent number: 4902173
    Abstract: A system for preventing contamination of particulate material in a railroad hopper car during transportation and unloading of the material from the car, comprising transporting the material in the railroad hopper car with a filter on each of the various inlet and outlet openings of the car, then upon reaching the point for unloading, applying a vacuum to draw the material out of the car through one spout with its filter removed, while leaving the filters in place on the other openings in the car to prevent contamination of the product from external sources during transportation and unloading. The preferred filter for the railroad car spouts has a frame, a conical filter bag, and a filter bag support ring for mounting on a spout on the car.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: February 20, 1990
    Assignee: Hendee Enterprises, Inc.
    Inventors: Alfred W. Hendee, Michael A. Click, Ralph E. Gerstung