Patents Assigned to Robert P. Agopian
  • Patent number: 5201622
    Abstract: A train apparatus for removing thick blister buildups from an underground fiber conduit used for housing power cables. The train apparatus includes three or more cutting units including an initial, a middle and a final cutting unit having smallest, medium and largest overall cutting diameters respectively. Each cutting unit having a lead guide and six cutting stars each having four cutting blades where the cutting blades on one cutting star are offset with the cutting blades on the other cutting stars. When pulled through the fiber conduit, the lead guide of the cutting units will prevent the cutting unit from going off the center of the conduit and digging itself into the interior sidewall of the conduit. The initial, middle and final cutting units will remove respectively the surface, the intermediate and the underneath portions sequentially.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: April 13, 1993
    Assignee: Robert P. Agopian
    Inventors: Robert P. Agopian, Shoji Tanaka