Earth working – Alternating for right or left hand operation – Tool shifted for opposite throw
Patent
1993-08-31
1995-10-03
Reese, Randolph A.
Earth working
Alternating for right or left hand operation
Tool shifted for opposite throw
172221, A01B 328, A01B 508, A01B 514
Patent
active
054544343
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an improved agricultural plough.
There is a need for improving ground preparation equipment for ploughing and the present invention is more especially concerned with those ploughs which use rotary tilling implements such as a plough disc or soil inversion wheel. Ploughing is commonly carried out using an appliance comprising one or more tilling apparatus secured rigidly by a clasp or other means to a carriage or frame of the plough. The plough body shanks are normally so-arranged that the lower pointed extremities of the tilling apparatus bodies are displaced towards the front of the appliance. In use, with the appliance trailed behind an agricultural vehicle such as a tractor, the ploughing elements penetrate the soil to be ploughed and are drawn through the soil to initiate an inversion or turning over of the soil. During such operations, soil irregularities, such as large consolidated clods and large flints and boulders are frequently encountered by the plough bodies and place lateral stress on the bodies, commonly resulting in bending or breaking of the bodies with consequent need for repairs to be carried out. A plough frame often has a reversing mechanism to enable efficient field procedure so that the plough can be used to produce both right- and left-hand furrows. Also, a variable width system may be provided to vary the width of the furrows as required. These prior structures are complex, often clumsy, and expensive to manufacture.
An aim of the present invention is to provide an agricultural plough which does not suffer from the disadvantages discussed above.
According to the present invention, there is provided an agricultural plough comprising a frame having a first portion adapted to be drawn by or mounted to a tractor and a second portion comprising a beam pivotally connected to the first portion so as to be alternatively pivotally positionable for left- and right-hand ploughing, and a plurality of tilling apparatus respectively connected to the beam by pivot connections, each tilling apparatus comprising a rotary tilling implement and a point for penetrating the soil forwardly of the leading edge of the tilling element, the rotary tilling element being in the form of a plough disc or soil inversion wheel with the tilling implement being mounted for rotation about a substantially horizontal shaft which itself is pivotable about its end remote from the tilling element for reversing the inclination of the tilling element relative to the direction of travel for changing the arrangement between right- and left-hand ploughing.
Preferably, the pivot axis of each said pivot connection extends in front of the leading part of the tilling apparatus towed from such pivot connection. The axis of the pivot connection from the beam to the tilling apparatus, in use, extends downwardly either square to, or at an acute angle, to the ground so as to pass in front of the foremost part of the leading point of the tilling apparatus.
In use of the plough, with a landslide extending from each point to the rear of the associated implement, when the frame beam is pulled behind the tractor or the like the rotary plough will normally trail automatically, being aligned parallel with the direction of forward travel by the stabilising effect of the landslide. However, the trailing action can create lateral stresses whilst ploughing when the plough comes up against obstructions in the ground. The pivot connection from the beam allows lateral displacement of the tilling apparatus which prevents stress or breakage.
The width of furrows can readily be controlled by simply adjusting, as by variably positionable stops, the angle of inclination of the beam to the direction of forward movement.
The invention will be further described, by way of example, with reference to the accompanying drawings, in which:
FIGS. 1 and 2 are diagrammatic plan illustrations of a plough embodying the invention with FIG. 1 showing the plough arranged for right-hand ploughing and FIG. 2 showing the alternative arrangement fo
REFERENCES:
patent: 735506 (1903-08-01), Hatcher
patent: 987477 (1911-03-01), McKay
patent: 1708297 (1929-04-01), Hansmann et al.
patent: 3101789 (1963-08-01), Jennings
patent: 3212587 (1965-10-01), Thompson
patent: 4687065 (1982-08-01), Cope et al.
Lagman Frederick L.
Reese Randolph A.
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