Patents Assigned to TPCO, Inc.
  • Patent number: 4472621
    Abstract: A separable junction for an electric pipeline system of the type including a tracer for skin-effect heating, which tracer comprises an insulated conductor within an electrically conductive conduit, incorporates flanges at the ends of the pipe section to be joined and the pipes are joined by securing bolts through holes in the flanges. Each end of the tracer conduit on each of the sections of pipe is terminated at and electrically connected to a metallic junction box adjacent to a flange and the tracer conductor thereof extends into the box. Each box has an opening aligned with one of the flange holes for the fastening bolts, but when the junction is assembled, the flange bolt which would be in alignment with the junction box opening is replaced with a hollow, threaded metallic nipple which is dimensioned to fit freely through the bolt holes in the flanges and is long enough to extend between and into the openings of the junction boxes at either side of the junction and electrically connect the boxes.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: September 18, 1984
    Assignee: TPCO, Inc.
    Inventor: Douglas Blackmore