Earth working – Alternating for right or left hand operation – Tool shifted for opposite throw
Patent
1989-02-10
1991-01-15
Reese, Randolph A.
Earth working
Alternating for right or left hand operation
Tool shifted for opposite throw
172223, 172760, 172264, A01B 340, A01B 1508
Patent
active
049846388
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a plow with one or more bodies each having a share and a mold-board of a special symmetrical shape, with variable working width and angle and intended to be connected to a tractor provided with a hitch for a trailed tool or with a two or three point linkage for a mounted or a semi-mounted tool.
In the past, changing the working direction as required by so-called "flat" plowing has been done by rotating the body-carrying frame which is fitted with "righthand" bodies and with "lefthand" bodies, thereby increasing the number of parts, and increasing the weight of the plow to the detriment of plow price and tractor performance. Each body is provided with a side piece called a "landside" bearing against the wall of the furrow and intended to prevent the plow from skidding sideways by virtue of the force exerted on the mold-board by the earth, with the mold-board being at an angle of attack .alpha. to the line of advance. The presence of the landsides further increases length, since the strip of earth to be turned over can do so freely only after each landside fixed on the preceding body has gone past.
The principle of symmetrical bodies is known, but their mold-boards constituted by elements which are cylindrical or semi-helical in shape and of excess length at the top both behind and in front, suffer from a lack of vertical trailing angle going backwards and downwards, thereby giving rise to front end clogging leading to insufficient penetration and to irregular burying of organic matter. Further, the junction between the outside side face of the plow share and the front, spur-shaped base of the mold-board constitutes an angle in whose hollow ground roots are retained, causing clogging to take place more quickly on entry into the ground when the same side face of the mold-board is used the next time.
Finally, plow body safety systems are known enabling the edge of the plow share to rise in a vertical plane which moves horizontally more or less parallel to the ground, with it being possible to retract the share whose tip pivots about an axis, however these two operations do not take place simultaneously and each of them presents its own drawback, with the first drawback being that the body takes up the selected depth over too long a distance, and the second being a mold-board which is vertically directed and which does not turn over the earth, with this second drawback occurring on all other systems having a share which pivots about a single direction about a pivot or an infinity of directions about a point.
The present invention seeks to provide possible ways of satisfying the above-mentioned drawbacks and insufficiencies and to provide solutions which are more effective and/or less expensive by proposing:
1. A special shape of symmetrical mold-board and share that plow properly in both working directions.
2. A rudder principle guiding the plow and replacing all of the landsides.
3. A single safety system for both working directions.
The various portions of the invention will be better understood from reading the following description and from examining the accompanying drawings which show several embodiments of the various elements used in the invention by way of non-limiting example.
In the drawings:
FIG. 1 is a plan view of a plow in accordance with the invention at work turning earth over to the right.
FIG. 2 shows the same assembly in longitudinal section with the body-carrying beam in its middle position.
FIG. 3 shows the shape of a conventional body.
FIG. 4 shows the shape of a body, mold-boards, and share in accordance with the invention.
FIG. 5 and 5a show a rear rudder positioned on the rear body or controlled by the system for pivoting the bodies on the beam.
FIG. 6 is a profile view of a multi-direction safety system.
FIG. 7 is a rear half view of the same assembly.
FIG. 8 is a detailed perspective view of the running path of the safety system.
The assembly constituted by FIGS. 1, 2, and 5 bis comprises a hitch frame 1 having pins 2 which are hitched to the draw bar
REFERENCES:
patent: 375802 (1888-01-01), Clark
patent: 623673 (1899-04-01), Kavanagh
patent: 3101789 (1963-08-01), Jennings
patent: 3115191 (1963-12-01), Ward
patent: 3123150 (1964-03-01), Jennings
patent: 3305025 (1967-02-01), Johnson et al.
patent: 4211286 (1980-07-01), Allen
patent: 4800963 (1989-01-01), Gomez
Reese Randolph A.
Thompson Jeffrey L.
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