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US 3,957,122 AGranted
Rotary ploughs
OwnerCornelis van der Lelyinventor
Life of this patent
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OwnerCornelis van der Lelyinventor
Estimating the term…
A rotary plough has one or more rotors rotatably mounted to be driven via a power take off about a horizontal axis that extends transverse to the direction of travel. Each rotor has a central support and axis of rotation and two spaced apart and oppositely positioned rotatable soil working members, each of which has a soil working support with two rows of tines. A driving connection is established between a P. T. O. and a shaft within the central support which turns each soil working member through a control mechanism. The control mechanism can be a pinion gear arrangement or a chain and sproket combination that turns the tine supports of the soil working members so that a transmission ratio is established to cause the tines to rotate more or less about their supports while also turning about the central support. Earth lumps are cut and lifted by the tines and then moved to an inverted position back to the dug out cavity. An adjusting lever is attached to turn the shaft relative to the central support which also varies the relative positions of the rows of tines and changes their angle of soil penetration. Two rotors can be provided each with two soil working members and the four members can be spaced 90.degree. apart around the central support.
A rotary plough comprising frame means and at least one elongated rotor mounted on said frame means, said rotor being rotatable about a first substantially horizontal axis of rotation defined by a shaft connected to said frame means, said rotor having at lease one soil-working member comprising a rotatable tine support with a row of tines having active soil working portions, said support being spaced from said shaft and rotatable about a corresponding, substantially horizontal axis that is spaced from said first axis, driving means connected to revolve said rotor and said driving means including a control mechanism that drivingly interconnects said shaft with said support, said control mechanism comprising gear means that establishes a transmission gear ratio and rotates said tines about said corresponding axis responsive to the revolutions of said rotor about said first axis, the soil engaging position of the soil working member and said tines being rotatable and movable in a forward direction with respect to the normal direction of movement of said rotor, said tines being progressively movable and rotatable about both of the axes to cut, raise and drop lumps of earth in inverted positions.
A rotary plough as claimed in claim 12, wherein an adjusting device is connected to said shaft and that shaft is turnable relative to said central support by said device, the soil engaging positions of said tines being adjustable by said device through said control mechanism during the non-rotation of said rotor.
A method of ploughing soil with an implement comprising at least one rotor having at least one working member for soil, said method comprising the steps of revolving said rotor and working member and causing the working member progressively to loosen successive slices of soil from surrounding undisplaced soil rotating said working member independent of said rotor to turn each loosened slice of soil around its axis while displacement of said working member takes place during revolution of the rotor around its own axis of rotation and depositing each successive loosened slice of soil back in the furrow or cavity from which it was excavated in substantially its original position lenghtwise of that furrow or cavity but in a substantially invented condition.
A rotary plough comprising frame means having at least one elongated rotor mounted on said frame meanss and said rotor being rotatable about a first substantially horizontal axis of rotation defined by a shaft connected to said frame means, each rotor having two spaced apart soil-working members and each soil-working member being a rotatable tine support with at least one row of tines on that support, driving means connected to said rotor for revolving same, said driving means including a control mechanism that interconnects said shaft with said support and said control mechanism comprising gear means that establishes a transmission gear ratio to rotate each soil-working member support about its corresponding axis of rotation, said tines having soil-working portions that extend forwardly in the soil-engaging position of the soil-working member, said tines being rotatable in a forward direction with respect to the normal direction of movement of said rotor, said tines being movable and rotatable about said axis of rotation and the axis of rotation of its corresponding support to cut, raise and drop lumps of earth in inverted positions.
A rotary plough comprising frame means having at least one elongated rotor mounted on said frame means and said rotor being rotatable about a first substantially horizontal axis of rotation defined by a shaft, said rotor having two spaced apart soil-working members and each soil-working member being a rotatable tine support with two oppositely positioned rows of tines mounted on that support, driving means connected to said rotor for revolving same, said driving means including a control mechanism that interconnects said shaft with each tine support, said control mechanism comprising gear means that establishes a transmission gear ratio to rotate each soil-working member with respect to the remainder of said rotor, said tines having soil-working portions that extend forwardly in the soil-engaging position of the soil-working member, said tines being rotatable in a forward direction with respect to the normal direction of movement of said rotor, said tines being movable and rotatable about said axis of rotation and the axis of rotation of its corresponding support to cut, raise and drop lumps of earth in inverted positions.
Dependencies are inferred from the claim text.