Patents by Inventor Dirk A. Frew

Dirk A. Frew 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).

  • Torque tight locking device
    Patent number: 5524936
    Abstract: A locking device for preventing relative rotation of pretorqued compression nuts used in face seal mechanical fittings includes an inner member having a cavity sized to slide onto and non-rotatably enclose the male or first nut of the fitting, an outer member having a first cavity sized to rotatably receive the inner member and a second cavity sized to slide onto and non-rotatably enclose the female or second nut of the fitting, and at least one set screw projecting inwardly through a threaded borehole in the outer member to non-rotatably engage and lock the inner member.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: June 11, 1996
    Assignee: Control Systems, Inc.
    Inventors: Thomas A. Barr, Christopher V. Barr, James C. Elliott, Dirk A. Frew