Device for spreading granular and/or powdery material

Fluid sprinkling – spraying – and diffusing – Container for non-fluid material – and scattering means – Including means varying scatter pattern of rotating scatterer

Patent

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Details

239670, 239682, 239684, 239687, 222482, A01C 1700, A01C 1900

Patent

active

046091530

DESCRIPTION:

BRIEF SUMMARY
SUMMARY OF THE INVENTION

This invention relates to a device for spreading granular and/or powdery material, such as fertilizer, seeds or similar material, comprising a frame, a hopper and at least two distribution members adapted to move about rotary axes.
According to the invention the two distribution members are arranged at a short distance from one another and coupled with a driving mechanism designed so that the distribution members can be driven as desired with any one of two or more different speeds. In this way a device is obtained by which the width over which the material is spread in one run can be controlled in a simple manner, while a uniform distribution pattern is obtained. An advantageous disposition of the distribution members is obtained when the parts of the distribution members nearest one another are spaced apart by a distance of about two centimeters.
An advantageous construction of the device embodying the invention is obtained when during the operation of the device of parts farthest remote from the rotary axes of the distribution members are moving on a circle having a diameter of about thirty-five centimeters.
A further aspect of the invention is concerned with a device of the kind set forth in the preamble in which the distribution members are coupled with a driving mechanism which is formed so that the distribution members can be rotated with a speed of at least 1040 rev/min. As a result the material can be very uniformly spread over a large width. According to a further aspect it is advantageous for the driving mechanism of the distribution members to comprise a plurality of gear wheels arranged in a gear box and being in mesh with one another between the distribution members, which are thereby coupled with one another. In this way it can be ensured that the two distribution members are driven with the same speed of rotation.
A further aspect of the invention relates to a device of the kind set forth in which in accordance with the invention the gear wheels arranged between the two distribution members are spur gear wheels rotatable about upwardly extending rotary axes and arranged in a gear box forming a flat, hollow beam between frame parts. This can have an advantageous effect on a low construction of the device.
According to a further aspect of the invention in a device of the kind set forth the hopper is made from a single piece of material. In this way the hopper can be readily made, while its lifetime will be satisfactory. The quantity of material to be carried for a run can be effectively increased by mounting an extension piece on the hopper.
According to a further aspect of the invention the hopper has two delivery spouts, each of which adjoins a distribution member, whereby at least one delivery spout is provided with delivery means adapted to move with respect to the hopper in a manner such that the place where the material is fed to the distribution member is displaceable about the rotary axis of the distribution member or in a radial direction relative to the rotary axis of the distribution member or both, the circumferential angle through which the material leaves the circumference of the distribution member being adjustable. In this way a spreading device is obtained by which the material can be spread in many ways so that during its travel the device can spread the material as desired for example, either on a narrow strip or on a very wide strip.
For a better understanding of the present invention and to show how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a spreading device embodying the invention;
FIG. 2 is a side elevation of the device taken in the direction of the arrow II in FIG. 1;
FIG. 3 is a plan view of the device shown in FIGS. 1 and 2;
FIG. 4 is a plan view of the device of FIGS. 1 to 3, the hopper being omitted;
FIG. 5 is an enlarged view of part of FIG. 4, the distribution members being omitted;
FIG. 6 is an enl

REFERENCES:
patent: 2489171 (1949-11-01), Balduf

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