Patents by Inventor John-Erik V. Blomqvist

John-Erik V. Blomqvist 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).

  • Lead-through for the fireproof disposition of electric cables through a wall
    Patent number: 4291195
    Abstract: A fireproof lead-through with a frame, comprising at least one frame half for fitting on one side of a wall with a rectangularly shaped pack of packing blocks through which cables pass filling the opening in each frame half, and engaging with it peripheral portions in channel-like profiled portions in each frame half. Stay strips with a special configuration engage with their ends in the profiled portions for stiffening the pack of blocks. The transit is made pressure-tight by the use of conventional wedging means or pouring composition.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: September 22, 1981
    Assignee: AB Lyckeaborgs Bruk
    Inventors: John-Erik V. Blomqvist, Erik M. Blomqvist