Parallel Separate Tools Patents (Class 172/228)
Interconnected for simultaneous raising and lowering (Class 172/229)
Independently operable (Class 172/230)
  • Plough
    Patent number: 5407016
    Abstract: A plough having a landslide and tilling mechanism, illustrated as a rotary disc or soil inversion wheel, which is pivotable in relation to the landslide between alternative positions providing for the left-hand or right-hand formation of a furrow, depending upon the direction of ploughing, when the plough is required to operate back and forth across a field.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: April 18, 1995
    Inventor: Peter D. T. Topham