Planting – Drilling and broadcasting – Main and auxiliary frame machines
Patent
1986-10-03
1988-10-04
Feyrer, James R.
Planting
Drilling and broadcasting
Main and auxiliary frame machines
A01C 700, A01C 718
Patent
active
047748974
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a seed drill and a method of operating a seed drill to produce marks along unsown rows so that these rows can be used as tracks or tramlines for tractor wheels in subsequent agricultural treatment operations before emergence of the crop makes the unsown rows visible.
It is now common practice to provide seed drills with tramlining means that operates to stop the delivery of seeds to selected coulters during selected bouts so as to produce crop free tracks or tramlines for the passage of the wheels of a vehicle that is subsequently to treat the crop, for example, by spraying or spreading fertilizer or insecticide. Also, it is known to provide seed drills with pre-emegent markers that operate in synchronism with the tramlining means to mark unsown rows so that they are visible and can be used before the crop emerges. Our British Pat. No. 2 050 784 discloses a drill provided with tramlining means and preemergent markers that are hydraulically operated. Necessarily, such markers are located at the rear of the drill behind the coulters and any harrow that might be fitted.
It is also conventional practice with seed drills to provide wheel track eradicators in the form of spring tines or the like that are aligned behind the tractor wheels so as to till the soil ready for sowing. In the case of a trailed drill, the eradicators are movably mounted so that they can be lifted out of work for turning on headlands or for transport of the drill.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide an improved method and means for use with a seed drill to mark unsown rows, especially a method and means that is suitable for use with a mounted drill and avoids or reduces loading at the rear of the drill.
According to the present invention, in a seed drill having tractor wheel track eradicators, coulters that sow rows of seeds along the line of the tractor wheel tracks, and tramlining means that serves to stop the supply of seed to said coulters to form tramlines on selected bouts; said track eradicators are lifted out of work when sowing a bout with tramlines so that the tractor wheel tracks remain and form a mark along the unsown rows. Preferably, said coulters are also lifted out of work with the track eradicators so as to avoid disturbing the tractor wheel tracks unduly.
It will be appreciated that the invention simply requires means to lift the track eradicators out of work when sowing a bout with tramlines, and that the same means can lift said coulters at the same time. There is therefore, no need to provide separate pre-emergent markers that would load the rear of the drill.
DESCRIPTION OF THE DRAWINGS
The invention will now be describe by way of example with reference to the accompanying drawings in which
FIG. 1 is a schematic side view of part of a fully mounted drill showing a track eradicator and coulter adapted to be lifted out of work together,
FIG. 2 is a front elevation of the track eradicator and coulter of FIG. 1, and
FIG. 3 is as schematic plan view of part of the drill of FIG. 1, showing the tramlining system.
BEST MODE OF CARRYING OUT THE INVENTION
The embodiment of the invention illustrated in FIGS. 1 to 3 is especially applicable to a fully mounted drill fitted with a tramlining system and tractor track eradicators. The coulters 1 are mounted across the width of the drill on a cross-bar 2, each coulter being pivotally connected to the cross-bar so as to trail behind it, and a tension spring 3 being provided beneath the pivot point between the cross-bar 2 and the coulter so as to urge the coulters downwards.
The tramlining mechanism enables the seed and fertilizer spouts associated with selected coulter assemblies to be automatically shut off from the seed and fertilizer hoppers on selected bouts during the sowing of a field.
As can be seen more clearly from FIG. 3, one seed spout and one fertilizer spout on each sde of the centre-line of the drill have their spout shutters 4 controlled by the tramlining mechanism so that they
REFERENCES:
patent: 4237985 (1980-12-01), Hoefkes
Feyrer James R.
Massey-Ferguson Services N.V.
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