Patents by Inventor Henry W. Schaaf

Henry W. Schaaf 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).

  • Center pivot irrigation system with corner watering arrangement
    Patent number: 4277023
    Abstract: This is concerned with a so-called center pivot irrigation system in which a string of pipe is supported on wheeled towers at intervals and pivots about a so-called center pivot or water supply either intermittently or continuously so that it waters or irrigates a generally circular area. This is more specifically concerned with an arrangement and a control for watering the corners or noncircular area of a field in a manner which is greatly simplified over a number of previous approaches.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: July 7, 1981
    Assignee: Lindsay Manufacturing Company
    Inventors: John L. Anderson, John C. Davidson, Henry W. Schaaf, Charles H. Meis
  • Center pivot irrigation system with corner watering arrangement
    Patent number: 4240582
    Abstract: This is concerned with a so-called center pivot irrigation system in which a string of pipe is supported on wheeled towers at intervals and pivots about a so-called center pivot or water supply either intermittently or continuously so that it waters or irrigates a generally circular area. This is more specifically concerned with an arrangement and a control for watering the corners or noncircular area of a field in a manner which is greatly simplified over a number of previous approaches.
    Type: Grant
    Filed: October 10, 1979
    Date of Patent: December 23, 1980
    Assignee: Lindsay Manufacturing Company
    Inventors: John L. Anderson, John C. Davidson, Henry W. Schaaf, Charles H. Meis