Patents by Inventor Ulf ?kesson

Ulf ?kesson 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).

  • Spring operated actuator for an electrical switching apparatus
    Patent number: 8338732
    Abstract: A spring operated actuator for an electrical switching apparatus. It has an opening spring and a closing spring, one of them including a torsion spring. The torsion spring is charged in the unwinding direction and discharged in the winding direction.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: December 25, 2012
    Assignee: ABB Technology AG
    Inventors: Daniel Staffas, Johannes Tredoux, Mats Holman, Ulf Åkesson