Patents by Inventor Esa Paananen

Esa Paananen 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).

  • Detector for locating underground cables and faults therein using high-powered electromagnet
    Patent number: 5210498
    Abstract: A method and an apparatus for locating from above the ground or water the position of or cable fault in a cable buried underground or underwater. An alternating magnetic field generated by high-powered electromagnet or a rotating magnet induces an indicator signal current in the wires of a cable to be examined. At one or both ends of the cable, the indicator signal is monitored by means of a receiver connected to the cable wires. The received and amplified indicator signal is transmitted by a radio phone back to the point of transmission, whereat the indicator signal is listened to for detecting the location of a cable and its possibly faulty section. According to the invention, a sufficient direct voltage is supplied between the wires of the cable. This creates a current whose loop closes through a faulty location and the indicator signal is separated from the current produced by the direct voltage.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: May 11, 1993
    Assignee: Tipteck Oy
    Inventor: Esa Paananen