Patents by Inventor James N. Kewin

James N. Kewin 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).

  • Tuyeres with independent cooling circuits for nose and body portions
    Patent number: 4166433
    Abstract: A cast tuyere has two independent cooling circuits for the nose and the body portions, respectively. The nose channel for the coolant having been formed by a removable frangible core around which the nose portion has been cast. The nose channel preferably additionally includes a rod extending centrally through it so as to define an annular passage for the cooling water.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: September 4, 1979
    Assignee: British Steel Corporation
    Inventor: James N. Kewin