Patents by Inventor Robert J. Shefbuch

Robert J. Shefbuch 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: 4289424
    Abstract: Apparatus for laying conduit, cable and the like, most advantageously in a trench, features a hopper embodied in a frame adapted to be placed within a trench and loaded with gravel or other embedment material. The construction and placement of the hopper provides for discharge therefrom of the embedment material as the frame is moved the length of the trench, the discharge being to the bottom and at one end of the frame and to a level metered by a readily adjustable control blade. A feed tube extended through the frame and the hopper, to position within the body of the embedment material introduced therein, is provided with a mount enabling its substantially universal adjustment. This feed tube serves to guide and discharge the conduit, cable or the like to be laid simultaneously with the discharge of the embedment material and within and at a predetermined level with respect thereto.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: September 15, 1981
    Assignee: Marvin E. Rue
    Inventors: Robert J. Shefbuch, Marvin E. Rue