Patents by Inventor Terry L. Lievestro

Terry L. Lievestro 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).

  • Drive head and ECM method and tool for making same
    Patent number: 6866769
    Abstract: A drive head for a bolt, fastener, coupling, nut or other driveable head made from a less malleable metal such as a powder metal nickel alloy. The drive head has an upper drive portion having at least six convex corners spaced around the outer periphery thereof, each corner terminating in an edge. The drive head also has a lower flange portion adjacent to the drive portion and having an edge extending radially outwardly to at least the edge of each corner. The drive portion and the flange portion of the drive head is formed by subjecting a blank having a generally circular head to electrochemical machining (ECM). A tool is also provided for the ECM method to form the drive portion and flange portion of the drive head.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: March 15, 2005
    Assignee: General Electric Company
    Inventors: William C. Anderson, Edward I. Stamm, Vicky S. Budinger, Terry L. Lievestro
  • Drive head and ECM method and tool for making same
    Publication number: 20030089621
    Abstract: A drive head for a bolt, fastener, coupling, nut or other driveable head made from a less malleable metal such as a powder metal nickel alloy. The drive head has an upper drive portion having at least six convex corners spaced around the outer periphery thereof, each corner terminating in an edge. The drive head also has a lower flange portion adjacent to the drive portion and having an edge extending radially outwardly to at least the edge of each corner. The drive portion and the flange portion of the drive head is formed by subjecting a blank having a generally circular head to electrochemical machining (ECM). A tool is also provided for the ECM method to form the drive portion and flange portion of the drive head.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 15, 2003
    Inventors: William C. Anderson, Edward I. Stamm, Vicky S. Budinger, Terry L. Lievestro