Patents by Inventor Fred O. Enstrom

Fred O. Enstrom 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).

  • Patent number: 7654287
    Abstract: A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The fitting has an internal recess cooperating with a test slide to block flow through the fitting. An externally accessible port allows insertion and removal of the test slide. The test slide has an internal recess in which a pressure release slide moves to open a hole to release pressure, and to close the hole to block flow through the fitting for pressure testing. After testing and the release of the fluid test pressure, the test slide is removed and a finish slide is inserted into the recess. The finish slide has an opening located and configured to coincide with the flow path through the male ends of the pipes, and to block the recess to provide a substantially uniform, cylindrical flow path through the fitting.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 2, 2010
    Assignee: Securus, Inc.
    Inventors: Greg P. Metzger, Fred O. Enstrom, Scott W. Randolph, Duane R. Condon, Thomas L. Kendall, Larry D. Brown, Dennis L. Hart
  • Patent number: 7398675
    Abstract: A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The fitting has an internal recess cooperating with a test slide to block flow through the fitting. An externally accessible port allows insertion and removal of the test slide. The test slide has an internal recess in which a pressure release slide moves to open a hole to release pressure, and to close the hole to block flow through the fitting for pressure testing. After testing and the release of the fluid test pressure, the test slide is removed and a finish slide is inserted into the recess. The finish slide has an opening located and configured to coincide with the flow path through the male ends of the pipes, and to block the recess to provide a substantially uniform, cylindrical flow path through the fitting.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: July 15, 2008
    Assignee: Securus, Inc.
    Inventors: Greg P. Metzger, Fred O. Enstrom, Scott W. Randolph, Duane R. Condon, Thomas L. Kendall, Larry D. Brown, Dennis L. Hart
  • Patent number: 6997041
    Abstract: A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The fitting has an internal recess cooperating with a test slide to block flow through the fitting. An externally accessible port allows insertion and removal of the test slide. The test slide has an internal recess in which a pressure release slide moves to open a hole to release pressure, and to close the hole to block flow through the fitting for pressure testing. After testing and the release of the fluid test pressure, the test slide is removed and a finish slide is inserted into the recess. The finish slide has an opening located and configured to coincide with the flow path through the male ends of the pipes, and to block the recess to provide a substantially uniform, cylindrical flow path through the fitting.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: February 14, 2006
    Assignee: Securus, Inc.
    Inventors: Greg P. Metzger, Fred O. Enstrom, Scott W. Randolph, Duane R. Condon, Thomas L. Kendall, Larry D. Brown, Dennis L. Hart