Patents by Inventor Leif Sköld

Leif Sköld 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).

  • Voltage surge protection device and high voltage circuit breakers
    Patent number: 8817445
    Abstract: A voltage surge protection device for protection of a high voltage device includes a varistor having a first part and a second part separated by varistor material. The voltage surge protection device further includes an expandable member arranged to act on a movable electrical contact for short-circuiting the voltage surge protection device upon a threshold voltage being applied between the first part and the second part of the varistor. A high voltage circuit breakers includes one or more semiconductor devices connected in series and the voltage surge protection device connected in parallel thereto.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: August 26, 2014
    Assignee: ABB Technology AG
    Inventors: Jan Lundquist, Jürgen Häfner, Leif Sköld, Håkan Wieck, Dag Andersson
  • VOLTAGE SURGE PROTECTION DEVICE AND HIGH VOLTAGE CIRCUIT BREAKERS
    Publication number: 20140226244
    Abstract: A voltage surge protection device for protection of a high voltage device includes a varistor having a first part and a second part separated by varistor material. The voltage surge protection device further includes an expandable member arranged to act on a movable electrical contact for short-circuiting the voltage surge protection device upon a threshold voltage being applied between the first part and the second part of the varistor. A high voltage circuit breakers includes one or more semiconductor devices connected in series and the voltage surge protection device connected in parallel thereto.
    Type: Application
    Filed: June 27, 2011
    Publication date: August 14, 2014
    Applicant: ABB TECHNOLOGY AG
    Inventors: Jan Lundquist, Jürgen Häfner, Leif Sköld, Håkan Wieck, Dag Andersson
  • System for assembly and maintenance of connection modules in high-voltage switchgear, a method therefor and a system component
    Patent number: 6430035
    Abstract: The invention relates to a system and a method for assembly and maintenance of connection modules (3) in high-voltage switchgear (1). According to the invention assembly and maintenance are performed in a service bay (6) in the vicinity of the switchgear. Modules (3a) to be assembled, replaced or repaired are transported between the service bay (6) and its site (2a) in the switchgear area by a service vehicle (4). The vehicle (4), connection modules (3) and the positions for their base plates (2) are thus so adapted to each other that the service vehicle (4) can move about in the switchgear area while the switchgear is in operation. A special aspect of the invention is the custom-design of the service vehicle (4) specifically for its purpose.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: August 6, 2002
    Assignee: ABB AB
    Inventors: Leif Sköld, Torbjörn Linder
  • Truck-mounted breakers intended for high-voltage lines and a method in connection to such lines
    Patent number: 6172866
    Abstract: A truck mounted breaker for high voltage lines. The breaker is a kind in which a linear displaceable contact device, including a plurality of units, coacts with a stationary countercontact device which includes a corresponding number of countercontact units. The breaker is intended for high voltage lines. All countercontact units are supported by a stand common to the units. The stand also supports the linear displaceable contact device. This arrangement ensures correct alignment of all pairs of contact and countercontact units.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: January 9, 2001
    Assignee: ABB AB
    Inventors: Leif Sköld, Torbjörn Linder, Jan Carlsson, Carl-Ejnar Sölver