Earth working – Automatic power control
Reexamination Certificate
1999-06-28
2002-02-26
Novosad, Christopher J. (Department: 3671)
Earth working
Automatic power control
C172S111000, C172S123000, C701S050000
Reexamination Certificate
active
06349775
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a soil working machine with drivable working members, in particular it relates to a rotary harrow provided with soil working members that are drivable about upwardly orientated axes.
BACKGROUND OF THE INVENTION
Such soil working machines are known. In case of a rotary harrow, the cultivation carried out by this machine is intended for the preparation of a seed-bed. When a large area of a parcel of land is worked, the composition, the compactness or the condition or a combination thereof of the soil may vary locally. For example, the soil of a certain subarea of a parcel may be more compacted than the remaining part of the parcel, or be composed of another type of soil, for example, more clay-like structure than the rest of the parcel, while another certain subarea may be more humid or more uneven than the remainder of the parcel. As a result thereof an uniform cultivation of the soil may not occur throughout the parcel, which may eventually result in a poor yield for certain areas.
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Bom Cornelis J. G.
de Groen Franciscus J. A.
van der Lely Alexander
van der Lely Olaf
Maasland, N..V.
Novosad Christopher J.
Penrose Lucas Albright
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