Patents by Inventor Joel J. Ludwig

Joel J. Ludwig 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).

  • Patent number: 6065321
    Abstract: An outlet for connecting spray nozzles, drop tubes or the like to an irrigation pipe comprising a generally cylindrical-shaped member having an inner end, an outer end, an annular shoulder protruding outwardly therefrom between the inner and outer ends, and an internally threaded bore extending therethrough. When the outlet is positioned in an opening formed in an irrigation pipe, the annular shoulder of the outlet is in engagement with the exterior surface of the pipe. A machine is also disclosed for creating a plurality of horizontally spaced-apart bulged areas in the pipe with each of the bulged areas having a flat surface thereon. The machine includes a bulging punch which creates the bulged areas in the pipe. The machine further includes a punch for creating an outlet opening in the flat surface of the bulged area.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: May 23, 2000
    Assignee: Valmont Industries, Inc.
    Inventors: Alois J. Kosch, Joel J. Ludwig
  • Patent number: 5938127
    Abstract: An outlet for connecting spray nozzles, drop tubes or the like to an irrigation pipe comprising a generally cylindrical-shaped member having an inner end, an outer end, an annular shoulder protruding outwardly therefrom between the inner and outer ends, and an internally threaded bore extending therethrough. When the outlet is positioned in an opening formed in an irrigation pipe, the annular shoulder of the outlet is in engagement with the exterior surface of the pipe. A machine is also disclosed for creating a plurality of horizontally spaced-apart bulged areas in the pipe with each of the bulged areas having a flat surface thereon. The machine includes a bulging punch which creates the bulged areas in the pipe. The machine further includes a punch for creating an outlet opening in the flat surface of the bulged area.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: August 17, 1999
    Assignee: Valmont Industries, Inc.
    Inventors: Alois J. Kosch, Joel J. Ludwig