Earth working – With drive means for tool or cleaner – Guided by walking attendant
Patent
1982-06-02
1985-12-17
Stouffer, Richard T.
Earth working
With drive means for tool or cleaner
Guided by walking attendant
172102, A01B 1906, B62D 5104
Patent
active
045587450
DESCRIPTION:
BRIEF SUMMARY
It is known to employ harrows, tillers and/or other earth moving equipment when working with soil, particularly for the construction of gardens, parks, and similiar facilites in which the soil is turned over to a depth of up to 50 cm., or loosened. In this work the soil must be passed through several times, so as to obtain a loosened earth crust. This preparation of the soil by a machine is not, however, sufficient in order to obtain an adequately smooth soil surface of a suitable fine consistency to plant the seed in the soil, so that a subsequent crushing of the earth, which includes large lumps, as well as a smoothing of the soil surface is unavoidable. Usually this type of work is accomplished by a pick or a rake to smooth out the soil surface, which entails time-consuming raking anyhow to obtain such a smooth surface. Altogether work of this type is very costly and time-consuming. Furthermore, as a result of this deep penetration or tearing open of the soil, the capillary layer is destroyed, which results in interrupting the supply of fluid nutrition for the seeds or plants.
It is known to use a machine of the aforedescribed type as a harrow from Swiss Pat. Nos. CH 310,738, 311,100, 332,396 and 448,558, in which a soil-working implement, which is arraged to oscillate in a direction transverse or at an angle to the direction of travel is provided with prongs reaching into the soil. These prongs, deeply reaching into the soil and oscillating transverse to the direction of travel or movement of the machine although reinforcing the crushing action of the harrow, result in the soil being only turned over to a considerable depth in a disadvantageous manner, without obtaining a smooth surface in which seeds can be planted.
SUMMARY OF THE INVENTION
It is an object of the invention to devise a machine of the aforesaid kind, while obviating the aforesaid disadvantages, in which the soil can be worked at a considerably reduced operating effort and reduced machine utilization in such a manner that while the capillary layer is maintained, there is additionally obtained an approximately smooth surface.
This object is attained, according to the invention, by the soil implement, which is arranged to execute oscillations in a direction transverse to the direction of travel, including a soil-leveling tool. This inventive solution permits, on one hand, that the engagement of the soil working implement with the soil is adjusted precisely to a certain depth by means of the soil-leveling tool, which is essential for the preparation of the upper soil layer, the so-called upper soil. The capillary layer required for the supply of liquid nutrition of the soil, which is destroyed by known earth working processes, as a result of the loosening of the soil to too great a depth, can be maintained unimpaired thereby. Additionally, due to the soil leveling tool, which extends within or along an upper region of the originally hard and not yet loosened soil, the loosened material is maintained in motion and advanced ahead of the soil leveling tool. Behind the soil-leveling tool there is therefore formed a loose and thin upper layer, alternatively called loosening layer, while therebelow there is maintained the thickened capillary layer. Thus, supply of nutrition from the soil is ensured, and simultaneously a smooth surface capable of receiving seeds is obtained. As a result of the loosening layer, oxygen also penetrates to the roots of the plants, thus facilitating the necessary growth of bacteria.
In a preferred version of the invention, a stationary crossbeam is arranged behind the soil-level tool as viewed in the direction of travel. This cross-beam supplements advantageously the effect of the soil-leveling tool, and simultaneously permits an additional abutment or stabilization along a wide surface, and guidance of the machine on the surface of the soil.
The soil-leveling tool of the machine is advantageously formed so that it has a cross section in the form of an angle, one of the blades thereof extending substantially paralle
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Bucher Guyer A.G.
Stouffer Richard T.
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