Patents by Inventor James P. Bruner

James P. Bruner 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).

  • Bainitic core grinding rod
    Patent number: 4840686
    Abstract: A carbon or alloy steel heat treated grinding rod having improved wear resistance and breaking resistance for use in a rotating grinding mill. The surface of the rod has a martensitic microstructure having a hardness of at least HRC 55. The core of the rod has a bainitic microstructure having a hardness of at least HRC 40. A preferred rod composition includes at least 0.7% carbon, at least 0.25% of molybdenum, at least 0.25% chromium, less than 0.7% manganese, the balance iron and unavoidable impurities, all percentages by weight.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: June 20, 1989
    Assignee: Armco Inc.
    Inventors: Charles R. Arnett, James P. Bruner