Patents by Inventor Göran Sundolm

Göran Sundolm 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).

  • Door actuator for cooling a fire door
    Patent number: 6779309
    Abstract: A hydraulic fire door, especially a sliding door, which can be selectively opened or closed by an actuator. In order to ensure a particularly fire resistant fire door without the heat resistance of the basic structure thereof having to be particularly fire resistant, the actuator is arranged to supply aqueous liquid to the fire door in order to cool it using the aqueous liquid.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: August 24, 2004
    Assignee: Marioff Corporation Oy
    Inventor: Göran Sundolm