Patents by Inventor Peter J. Langeman

Peter J. Langeman 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).

  • Irrigation ditch gate
    Patent number: 4349296
    Abstract: A gate for an irrigation ditch includes a rectangular frame, in which a pair of gates are pivotally mounted on shafts for rotation around vertical axes at the sides of the frame; helical springs connected to the top ends of the shafts and to the frame for regulating the water pressure required to open the gates; and tensioning elements for changing the length and consequently the tension of the springs, so that the pressure required to open the gates can be adjusted.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: September 14, 1982
    Inventor: Peter J. Langeman