Patents by Inventor Lars-Olof Efraimsson

Lars-Olof Efraimsson 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: 6288339
    Abstract: Self-supporting cables include at least one insulated conductor that includes a conductor having at least one wire and an insulation around the cable conductor. The cable further includes at least one longitudinally extending shield band and a jacket. The shield band is rigid in a radial direction and includes undulations that extend mainly in a tangential direction. The shield band includes undulations which correspond to the jacket undulations. A weak radially acting compressive force causes the jacket undulations and the shield band undulations to cam into each other, such that the force of gravity acting on the cable between the cable fixing points is transmitted into the conductors, and an axially acting force in the absence of slippage between the different cable layers. The cable becomes self-supporting by virtue of the mechanical strength of the conductors.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: September 11, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lars-Olof Efraimsson, Ulf Johnsen