Patents by Inventor Gary M. Plyler

Gary M. Plyler 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).

  • Ditching machine with offset draft vehicle
    Patent number: 4620381
    Abstract: This two-wheeled machine for cutting and dressing road shoulders and drainage ditches is designed to be towed behind a powered tractor. A ditch cutting disc is directly connected to an offset portion of the machine frame. The ditch end of a scraper blade is structurally attached behind the cutting disc from the disc mounting structure. An offset draft bar permits the tow tractor to be operated closer to the road center and out of the road gutter as the outboard wheel of the ditching machine runs in the ditch channel.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: November 4, 1986
    Assignee: Westvaco Corporation
    Inventors: Gary M. Plyler, Michael G. Tisdale