Fluid sprinkling – spraying – and diffusing – Container for non-fluid material – and scattering means – Including means varying scatter pattern of rotating scatterer
Patent
1984-09-27
1988-08-16
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Container for non-fluid material, and scattering means
Including means varying scatter pattern of rotating scatterer
239667, 74526, A01C 1900
Patent
active
047638443
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to the spreading of material on a surface, and particularly, although not exclusively, to a spreader for spreading fertilizers, in granular or powdery form, over agricultural land.
BACKGROUND ART
Spreaders are known which comprise a frame and a spreading member which is movable about an axis to eject material to be spread, the spreader having fastening means for mounting the spreader on a carrier. For example, DE-AS No. 1,180,562 discloses a spreader which can be coupled with the three-point lifting device of a tractor. The spreader can be set in an inclined position relative to the normal direction of operative travel by displacing one of the two lower lifting arms of the three-point lifting device of the tractor with respect to the other lifting arm. However the adjustment of the spreader into the inclined position can be carried out only with difficulty, and requires troublesome measurement. Returning the spreader to the normal level position is also a troublesome job, and can be accomplished only with difficulty. DE-AS No. 1,180,562 also discloses a spreader which can be mounted on an intermediate frame in order to set the spreader in an inclined position. With this construction the spreader can be displaced between the inclined position and the level position only with difficulty. With the known spreaders, the inclined position is used so that the material is spread on each side of the device over equal distances.
SUMMARY OF THE INVENTION
According to the present invention, the spreader is adapted to assume selectively an operative condition in which, on one side of the spreader, the material is spread uniformly over a reduced spreading width.
Embodiments in accordance with the present invention provide spreaders which can be readily set in a given tilted position from the normal working position in order to spread the material on one side over a smaller distance than in the normal, horizontal working position of the device. This can be achieved by making part of the fastening means displaceable upwardly and downwardly with respect to the frame. This part of the fastening means can then be arranged in at least two different positions so that by displacing the fastening means the spreader can be set in an inclined position and the spreading width to one side of the spreader can be limited. In this manner the material can be spread over a shorter distance, in particular, along the edges of fields to be covered. The inclined or tilted position can thus be used so that the material is spread uniformly and with desired flow rates at the edges of a field without the need for further adjustments of the spreader. Before now, the so-called lateral spread has required closing of one or more outlet ports with respect to the rotary axis of the distribution member to obtain the required direction of spreading. With the known-device and methods it is difficult to obtain the desired, uniform distribution pattern over a restricted width. These problems are overcome in spreaders in accordance with the present invention.
An advantageous embodiment of a spreader in accordance with the invention is obtained if the fastening means comprises a carrying arm which is pivotable with respect to the frame about a substantially horizontal pivotal axis. In another embodiment, the fastening means comprises a plate rigidly secured to the frame and having a slot in which a coupling element for coupling the spreader to a tractor is movable with respect to the frame and can be set in either of at least two different positions in the slot. Thus, the fastening means has few movable parts and can be easily manufactured.
In a further embodiment of a spreader in accordance with the present invention, the fastening means comprises an adjusting mechanism for displacing at least part of the fastening means upwardly and downwardly with respect to the frame. Tilting the spreader can thus be readily carried out.
In another embodiment in accordance with the present invention the frame is provided with
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Bom Cornelis J. G.
van der Lely Ary
van der Lely Cornelis
C. van der Lely N.V.
Kashnikow Andres
Weldon Kevin Patrick
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