Patents by Inventor Fride Moberg

Fride Moberg 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).

  • Depth-indicating planting machine
    Patent number: 3998171
    Abstract: A planting machine is provided having a pneumatic depth indicator on the digging tool and comprising at least one gas conduit for conveying a gas under superatmospheric pressure from one end to the other end thereof, the one end being connected to a gas supply source, and the other end being open to atmosphere and spaced a distance from the digging tool end equal to the depth of the hole dug by the tool for a plant, the other end being so arranged that the opening to atmosphere is plunged into blocking contact to the earth when the predetermined hole depth is reached, thereby halting flow of gas from the conduit.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: December 21, 1976
    Assignee: Mo och Domsjo
    Inventors: Stig-Gunnar Lofgren, Fride Moberg