Plough

Earth working – Alternating for right or left hand operation – Tool shifted for opposite throw

Patent

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Details

172228, A01B 328

Patent

active

054070163

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a plough. This invention also relates to a tractor when provided with the plough.
Many farms burn the residue of crops such as, for example, wheat straw in situ. The burning is a speedy way of getting rid of the residual part of the crops and the burning also effects a degree of weed and pest control. The burning of the crops is currently not favoured by many farms and local authorities and the alternative is to plough the residual part of the crops back into the land. The land on many farms is heavy which means that the land is difficult to plough. The land tends to stay lumpy and it is time consuming and expensive to plough the land down to a good tilth for enabling the seeding of fresh crops. Often discs are used to break up the soil but the use of such discs in wet conditions tends to pan the soil which stops water running through. The soil may tend to become like a mulch during heavy rain and then the land cannot be worked satisfactorily.
Given that some farms will prefer, or will be required by law, to plough in the residue of their crops, then it is desirable to ensure that the ploughing is effected as simply and as economically as possible. The known ploughs comprise a soil turning mechanism and a stabilising mechanism for keeping the plough in a straight line in a single direction during ploughing. During ploughing, the soil turning mechanism creates a sideways motion when turning over the soil, and this sideways motion is counteracted and balanced by the stabilising mechanism.
One known and presently well used stabilising mechanism is that known as a landslide. The known landslide is generally a flat piece of metal which slides in a single direction along the inside edge of a ploughed open furrow. As the landslide slides along the inside edge of the ploughed furrow, the landslide is subjected to wear and abrasion on one side only. The soil turning mechanism, for example a mouldboard, an inversion wheel or a disc, keeps the same position relative to the position of the landslide. Basically the landslide is rigidly fixed in position with respect to the soil turning mechanism, although in some cases there may be some adjustment available on the landslide for counteracting wear or aiding the forward movement of the plough. At the end of a line of ploughing, it is necessary to reverse the plough in order to plough a new line in the reverse direction. The reversing of the soil turning mechanism is often effected by an up and over movement which ensures that one half of the available soil turning mechanism and landslide operate when ploughing one way, and the other half of the available soil turning mechanism and landslide operate when ploughing the other way. The practice of reversing the soil turning mechanism with an up and over movement and using many landslides is complicated, time consuming and expensive. Also, the plough has twice the number necessary of soil turning mechanisms and stabilising systems as it might otherwise have since only one half is used at a time, with the other half being in transit.
It is an aim of the present invention to obviate or reduce the abovementioned problem.
According to the present invention, there is provided a plough comprising a soil tilling means and stabilising means for maintaining direction of movement of the plough during ploughing, said stabilising means comprising a fixed landslide and said soil tilling means being pivotally movable between first and second positions, relative to the landslide such that in the first position, the tilling means is operative to displace soil in one direction away from the direction of extent of the landslide and in the second position is operative to displace soil in the opposite direction away from the direction of extent of the landslide. Preferably, the soil tilling means comprises a rotatable tilling member which is supported for rotation by an arm which itself is pivotable about an upwardly extending axis for swinging movement between said first and second positions.
The arm may be a vertical

REFERENCES:
patent: Re17293 (1929-05-01), Shave
patent: 301313 (1884-07-01), Willis
patent: 778838 (1905-01-01), Belk
patent: 860894 (1907-07-01), Belk
patent: 964230 (1910-07-01), Gash
patent: 4216730 (1980-08-01), Noble

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