Patents by Inventor Jan Mantingh

Jan Mantingh 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).

  • Mobile earth mover having a scraper blade
    Patent number: 4969279
    Abstract: An earth mover comprising at least one wheeled axle; a supported frame movable by the axle, said frame further including means for pushing up soil, comprising an elongate scraper blade with a ground-facing sharp longitudinal edge being substantially right-angled to the forward direction of travel of the apparatus. The apparatus is characterized by a cylindrical rotor provided at an interspace from, and in operative position above, the scraper blade, and substantially parallel thereto. It is also characterized by means for rotating the rotor in a direction from the longitudinal edge towards the upper portion of the scraper blade; and by bars mounted on the rotor. The distance from the turning circle circumference of the bars to the scraper blade decreases in the rotation direction of the rotor.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: November 13, 1990
    Inventor: Jan Mantingh
  • Mobile earth mover bowl with loading rotor
    Patent number: 4928409
    Abstract: An earth mover comprising at least one wheeled axle; a supported frame movable by the axle, said frame further including means for pushing up soil, comprising an elongate scraper blade with a ground-facing sharp longitudinal edge being substantially right-angled to the forward direction of travel of the apparatus. The apparatus is characterized by a cylindrical rotor provided at an interspace from, and in operative position above, the scraper blade, and substantially parallel thereto. It is also characterized by means for rotating the rotor in a direction from the longitudinal edge towards the upper portion of the scraper blade; and by bars mounted on the rotor. The distance from the turning circle circumference of the bars to the scraper blade decreases in the rotation direction of the rotor.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: May 29, 1990
    Inventor: Jan Mantingh