Patents by Inventor Norman A. Plumpton

Norman A. Plumpton 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).

  • Mineral mining machine with high pressure fluid nozzle and intensifier
    Patent number: 4314730
    Abstract: The machine comprises a rotatable cutting head and a high pressure water nozzle. The nozzle directs a jet of high pressure (up to 2,100 kg/cm.sup.2) water at the rock adjacent the cutting head. The jet of water provides an auxiliary cutting and breaking action, thus easing the load on the head. The water jet also suppresses dust formation.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: February 9, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Norman A. Plumpton, Malcolm G. Tomlin