Patents by Inventor Eric T. Skibsted

Eric T. Skibsted 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).

  • Roadway conditioning apparatus
    Patent number: 5197820
    Abstract: A surface conditioning attachment for a motor grader or the like for use in maintenance operations on gravel roadways comprises a gang of harrow disks carried on a support shaft, there being a support structure for deploying said disks laterally outwardly of the grader at an angle to the direction of travel and with the concave sides of the disks facing forwardly. In use the gang of disks engages the surface of the road shoulder and cuts up and moves gravel and vegetation thereon laterally towards the roadway.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: March 30, 1993
    Inventor: Eric T. Skibsted
  • Roadway conditioning apparatus
    Patent number: 5108221
    Abstract: A surface conditioning attachment for a motor grader or the like for use in maintenance operations on gravel roadways comprises a gang of harrow disks carried on a support shaft, there being a support structure for deploying said disks laterally outwardly of the grader at an angle to the direction of travel and with the concave sides of the disks facing forwardly. In use the gang of disks engages the surface of the road shoulder and cut up and moves gravel and vegetation thereon laterally towards the roadway.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: April 28, 1992
    Inventor: Eric T. Skibsted
  • Roadway conditioning apparatus
    Patent number: RE34860
    Abstract: A surface conditioning attachment for a motor grader or the like for use in maintenance operations on gravel roadways comprises a gang of harrow disks carried on a support shaft, there being a support structure for deploying said disks laterally outwardly of the grader at an angle to the direction of travel and with the concave sides of the disks facing forwardly. In use the gang of disks engages the surface of the road shoulder and cuts up and moves gravel and vegetation thereon laterally towards the roadway.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: February 14, 1995
    Inventor: Eric T. Skibsted