Patents Assigned to Thunder Bay Northland Machinery Inc.
  • Rotary grain cleaner
    Patent number: 4543179
    Abstract: Rotary grain cleaning machines are well known. The present invention provides a grain cleaning machine comprising an aspirator unit and a screen unit. The screen unit has an inner frame assembly suspended from an outer frame assembly, inclined screen decks secured to the inner frame assembly and means for causing the inner frame assembly to rotate in a substantially circular path within the outer frame assembly.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: September 24, 1985
    Assignee: Thunder Bay Northland Machinery Inc.
    Inventor: Norman Berglund