Earth working – Rolling – rotating or orbitally moving tool – Tools on different axes in mutual driving relationship
Patent
1989-08-22
1991-12-24
Taylor, Dennis L.
Earth working
Rolling, rotating or orbitally moving tool
Tools on different axes in mutual driving relationship
172532, 172608, A01B 2700
Patent
active
050743635
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a device for treating soil, in particular by breaking up of soil clods and compacted soil.
Conventional agricultural techniques already employ a large number of soil-treatment devices designed to loosen and compact the soil to make possible the next sowing after harvest, or else to treat it after clearing of stubble.
The systems now used for this purpose have a number of major disadvantages, a principal one among them being the packing in of ground that is too light or the muddying of heavy land.
SUMMARY OF THE INVENTION
The present invention remedies these disadvantages, focusing on a device for treating the soil by the breaking up of soil clods and compacted soil. The device may, at the discretion of the user, be used alone or in combination with other conventional soil-preparation systems.
The device in accordance with the invention, which may be harnessed to a traction apparatus in any conventional manner (e.g., to a three-point hitch of a tractor), is characterized by the fact that it is composed of a carrier frame which is angularly maneuverable in relation to the direction of movement of the tractor. The carrier frame includes at least two helical, rotating blade elements, at least one of which rolls on the ground. Each of the helical elements incorporated in the frame, whether of identical or varying diameter, has a pitch and a diameter such that, during rotation, the spires of one remain in close contact with the spires of the other.
Thus, continuous cleaning of the spires of the helical elements mounted on the device is achieved. At the same time, because of the spiral or helical nature of the blade elements, the spires thereof are angled in relation to the longitudinal or forward direction of movement of the device. This angled relationship ensures a complementary ground-treating effect, in which the earth is mixed and spread out to a greater extent by the spires of the blade elements, than if the blade elements were in parallel with the longitudinal direction.
In order to ensure, according to the invention, mutual sliding movement of the spires of one helical blade element against the spires of the other helical blade element, the helical blade elements are operatively coupled together for simultaneous rotation.
Other characteristics and advantages of the invention will emerge from the following description taken with reference to the attached drawings which represent, diagrammatically and solely as examples, various embodiments of an earth-breaking and compacting device appropriate for agricultural use.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a plan view of a first embodiment of a device according to the invention, incorporating two identical helical blade elements, both of which roll on the ground;
FIG. 2 is a side view of the device shown in FIG. 1, shown without an attachment chain;
FIG. 3 is a rear perspective view, partially cut away, of the device shown in FIGS. 1 and 2;
FIG. 4 is a side view of a firs embodiment of the apparatus, incorporating two differing helical blade elements which do not both rest on the ground;
FIG. 5 is a side view of a second embodiment of the device;
FIG. 6 is a side view of a third embodiment of the apparatus; and
FIGS. 7-10 show alternative cross sectional configurations for the helical blade elements usable with any of the embodiments shown in FIGS. 1-6.
DETAILED DESCRIPTION OF THE INVENTION
The apparatus in accordance with the invention incorporates a frame fitted with having means thereon for harnessing the apparatus to a tractor. For example, such harnessing means may include a plough-beam movable in relation to axes of helical blade elements (described below) which constitute the main part of the device. Such conventional means, which does not, by itself, form an inventive feature of the invention, has not been illustrated for reasons of simplicity.
As shown in FIG. 1, in a first embodiment, the device of the present invention includes two identical blade elements r
REFERENCES:
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patent: 2503317 (1950-04-01), Berquist
patent: 2513186 (1950-06-01), Leaman
patent: 2997113 (1961-08-01), van der Lely
patent: 3897830 (1975-08-01), van der Lely
Boucton Jean
Franquet Benoit
Etablissements Franquet
Taylor Dennis L.
Thompson Jeffrey L.
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