Patents by Inventor Gunnar Lofgren

Gunnar Lofgren 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).

  • Roll-handling attachment for lifter
    Patent number: 6648580
    Abstract: An apparatus for moving a roll of material having a cylindrical bore from a vertical position on a surface to a horizontal position at a height above the surface includes a support mandrel for positioning in the bore in advance of moving the roll. An expansion assembly cooperates with the support mandrel for varying a lateral dimension of the support mandrel between a bore insertion dimension at which the support mandrel is inserted into and withdrawn from the bore, and a bore engaging dimension at which the support mandrel engages the walls of the roll defining the bore and locks the support mandrel and the roll together against relative movement. A swivel assembly to which the support mandrel is connected, rotates the support mandrel from the vertical position to the horizontal position. The swivel assembly is vertically moveable along a stanchion, enabling positioning of the roll at a desired height.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: November 18, 2003
    Assignee: R ON I, LLC
    Inventor: Gunnar Lofgren
  • Roll-handling attachment for lifter
    Publication number: 20020054811
    Abstract: An apparatus for moving a roll of material having a cylindrical bore from a vertical position on a surface to a horizontal position at a height above the surface includes a support mandrel for positioning in the bore in advance of moving the roll. An expansion assembly cooperates with the support mandrel for varying a lateral dimension of the support mandrel between a bore insertion dimension at which the support mandrel is inserted into and withdrawn from the bore, and a bore engaging dimension at which the support mandrel engages the walls of the roll defining the bore and locks the support mandrel and the roll together against relative movement. A swivel assembly to which the support mandrel is connected, rotates the support mandrel from the vertical position to the horizontal position. The swivel assembly is vertically moveable along a stanchion, enabling positioning of the roll at a desired height.
    Type: Application
    Filed: November 2, 2001
    Publication date: May 9, 2002
    Inventor: Gunnar Lofgren