Patents by Inventor Norbert Anthony Bruns

Norbert Anthony Bruns 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).

  • Fluted electrochemical machining
    Patent number: 6413407
    Abstract: An ECM apparatus includes a fluted cathode tool for being driven through a tubular workpiece for electrochemically forming internal flutes therein. The cathode tool is sealed at one end for isolating electrolyte over the flutes thereof to seal against flow of the electrolyte past the tool and into the finished fluted bore.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: July 2, 2002
    Assignee: Lehr Precision, Inc.
    Inventors: Norbert Anthony Bruns, Edward Charles Bruns, Thomas Howard Chamberlain