Patents by Inventor John Ellermann Jespersen

John Ellermann Jespersen 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).

  • Wind turbine blade with a system for deicing and lightning protection
    Patent number: 6612810
    Abstract: Wind turbine blade comprises a first (1) and a second (2) electric conductor extending in the longitudinal direction of the blade (25), and one or more electric heating elements (4) for heating the surface of the blade. The heating elements (4) are connected to the first and the second electric conductor. At its tip the wind turbine blade (25) is provided with a lightning receptor 5 for catching lightning, and the lightning receptor (5) is electrically connected to a third (3) conductor earthed so as to be able to carry the current from a stroke of lightning to the earth. The first and the second conductor are connected to the lightning receptor through spark gaps adjacent said lightning receptor and connected to earth through spark gaps adjacent the blade root.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 2, 2003
    Assignee: LM Glasfiber A/S
    Inventors: Kaj Olsen, Flemming Møller Larsen, Peter Grabau, John Ellermann Jespersen