Patents by Inventor Olof Heyman

Olof Heyman 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).

  • High voltage bushing and high voltage device comprising such bushing
    Patent number: 8049108
    Abstract: A high voltage bushing for a high voltage device containing insulating liquid includes a voltage grading shield, improving performance and facilitating manufacturing.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: November 1, 2011
    Assignee: ABB Technology Ltd.
    Inventors: Ralf Hartings, Björn Jacobson, Olof Heyman, Dan G. Gustavsson, Rutger Johansson
  • Land electrode
    Patent number: 7939751
    Abstract: A return path between a first HVDC station and a second HVDC station. A first electrode is connected to the first station and a second electrode is connected to the second station. The return path includes a first part including a first low resistive zone through the crust of the earth in which the first electrode is embedded. A second part includes the earth mantle. A third part includes a second low resistive zone through the crust of the earth in which the second electrode is embedded.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: May 10, 2011
    Assignee: ABB Technology Ltd.
    Inventors: Gunnar Asplund, Olof Heyman, Urban Åström
  • LAND ELECTRODE
    Publication number: 20100230125
    Abstract: A return path between a first HVDC station and a second HVDC station. A first electrode is connected to the first station and a second electrode is connected to the second station. The return path includes a first part including a first low resistive zone through the crust of the earth in which the first electrode is embedded. A second part includes the earth mantle. A third part includes a second low resistive zone through the crust of the earth in which the second electrode is embedded.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 16, 2010
    Applicant: ABB Technology Ltd.
    Inventors: Gunnar Asplund, Olof Heyman, Urban Åström
  • High Voltage Bushing and High Voltage Device Comprising Such Bushing
    Publication number: 20090000806
    Abstract: A high voltage bushing for a high voltage device containing insulating liquid includes a voltage grading shield, improving performance and facilitating manufacturing.
    Type: Application
    Filed: December 22, 2006
    Publication date: January 1, 2009
    Applicant: ABB Technology Ltd.
    Inventors: Ralf Hartings, Bjorn Jacobson, Olof Heyman, Dan G. Gustavsson, Rutger Johansson