Spreading device for effecting a uniform distribution of material such as fertilizer

A device for spreading material, comprising material ejecting means which includes at least one distribution member adapted to rotate about a substantially vertical axis, and material feeding means of such character that through which, during operation of the device, material to be spread is supplied substantially at 360.degree. around said axis to said distribution member and material is ejected substantially uniformly substantially 360.degree. outwardly from said distribution member, and material deflector means located outwardly of the circumference of said distribution member, said deflector means being entirely spaced from a plane passing through said axis and being disposed at substantially right angles to the longitudinal centerline and direction of operative travel of the device, said deflector means comprising a screening plate which is configured whereby the kinetic energy of material impinging thereon is reduced to an extent that after impact on said screening plate the material drops substantially directly downwardly as seen from said direction of travel and said deflector means otherwise being so constructed and arranged that material from said ejection means which impinges on said deflector means is received on the underlying surface in a substantially uniform density.

A device for spreading material comprising at least one distribution member adapted to rotate about a substantially vertical axis, feed means through which, during the operation of the device, material to be spread is supplied around said axis to said distribution member, and deflector means located outwardly of the circumference of said distribution member and extending as seen from above substantially in the same direction without curving, said deflector means being entirely spaced to the rear of a plane tangential to the rearmost operative circumference of said distribution member and being disposed at substantially a right angle to the intended direction of operative travel of the device, said deflector means comprising a screening plate extending on both sides of a vertical plane passing through said axis in said direction of operative travel, said screening plate having a width which is at least about 1.5 times the operative diameter of said distribution member and is smaller than four times said diameter of the distribution member, said screening plate being located at a distance from said axis which exceeds three-quarters of the diameter of said distribution member and being so constructed and arranged that it modifies the distribution pattern of the material being spread to be received on the underlying surface in a substantially uniform density.

A device for spreading material comprising at least one distribution member adapted to rotate about a substantially vertical axis, feed means through which, during the operation of the device, material to be spread is supplied around said axis to said distribution member, and deflector means located outwardly of the circumference of said distribution member, said deflector means being entirely spaced from a plane passing through said axis and being disposed at substantially a right angle to the intended direction of operative travel of the device, said deflector means comprising a screening plate which is substantially at right angles to the longitudinal centerline of the device, said screening plate having a width which is at least about 1.5 times the operative diameter of said distribution member and is smaller than about four times said diameter of the distribution member, said screening plate not being curved as seen from above throughout said width, said screening plate intercepting the plane of rotation of said distribution member and being located at a distance from said axis which exceeds three-quarters of the diameter of said distribution member and of such character to modify the spreading pattern of the material so it is received on the underlying surface in a substantially uniform density.

A device for spreading material comprising at least one distribution member adapted to rotate about a substantially vertical axis, feed means through which, during the operation of the device, material to be spread is supplied around said axis to said distribution member, and deflector means located outwardly of the circumference of said distribution member, said deflector means being entirely spaced to the rear of a plane tangential to the rear circumference of said distribution member and being disposed at substantially a right angle to the intended direction of operative travel of the device, said deflector means comprising a screening plate extending on both sides of a vertical plane passing through said axis in said direction of operative travel, said screening plate extending over an angle around said vertical axis which is smaller than 120.degree. and larger than 80.degree., said screening plate being straight as seen from above through at least 80.degree. of said angle, said screening plate being spaced from said vertical axis over a distance which exceeds three-quarters of the diameter of said distribution member and otherwise being arranged so it is adapted to cause the material being spread to be received on the underlying ground in a density which is substantially uniform.

A device for spreading material comprising material ejecting means which includes at least one distribution member adapted to rotate about a substantially vertical axis, material feeding means of such character that through which, during the operation of the device, material to be spread is supplied substantially 360.degree. around said axis to said distribution member and material is ejected substantially uniformly substantially 360.degree. outwardly from said distribution member by said ejecting means, and material deflector means located outwardly of the circumference of said distribution member, said deflector means being entirely spaced from a plane passing through said axis and being disposed at substantially a right angle to the intended direction of operative travel of the device, said deflector means comprising a screening plate which has a substantially flat shape and is substantially at right angles to the longitudinal centerline of the device, said deflector means otherwise being so constructed and arranged that material from said ejecting means which impinges on said deflector means is received on the underlying surface is substantially uniform density.

A device for spreading material comprising at least one distribution member adapted to rotate about a substantially vertical axis, feed means through which, during the operation of the device, material to be spread is supplied around said axis to said distribution member, and deflector means located outwardly of the circumference of said distribution member, said deflector means being entirely spaced to the rear of a plane tangential to the rear circumference of said distribution member and being disposed at substantially a right angle to the intended direction of operative travel of the device, said deflector means comprising a screening plate extending on both sides of a vertical plane passing through said axis in said direction of operative travel, said screening plate extending over an angle around said vertical axis which is smaller than 120.degree. and larger than 80.degree., said screening plate being spaced from said vertical axis over a distance which exceeds three-quarters of the diameter of said distribution member and, as seen in plan, being substantially straight and extending at right angles to the longitudinal centerline of the device, said screening plate otherwise being arranged so it is adapted to cause the material being spread to be received on the underlying ground in a density which is substantially uniform.