Patents by Inventor Paul S. Kuzniar

Paul S. Kuzniar 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).

  • Rock drilling bit and a method of producing the same
    Patent number: 4756373
    Abstract: A rock drilling bit comprises a steel body defining a cutting face with hard material inserts press-fitted into preformed openings in the cutting face. The inserts have ends extending outwardly of the cutting face which perform the actual drilling or cutting operation. The face surface of the body is case hardened except for narrow continuous bands about each insert opening. A method particularly suited for forming the case hardened cutting face is also disclosed.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: July 12, 1988
    Assignee: TRW Inc.
    Inventors: Robert F. Kane, Joseph J. Portugal, Paul S. Kuzniar