Patents by Inventor John Gilmour Glassford

John Gilmour Glassford 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).

  • Disc cutting unit for use on rock boring machines
    Patent number: 3981370
    Abstract: A rock-boring machine of the type comprising a rotatable headplate having a plurality of disc cutting units mounted on the front face of the headplate. Each disc cutting unit includes an annular rotatable body having a continuous recess extending around its periphery and a plurality of cutting segments located in the recess. The segments are secured in the recess by means of removable clamping means.
    Type: Grant
    Filed: May 31, 1973
    Date of Patent: September 21, 1976
    Assignee: Hard Metals Limited
    Inventors: Henry Bingham, John Gilmour Glassford, Noel Cuthbert Pope