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Mobile spreader

  • US 4,155,315 A
  • Filed: 12/16/1977
  • Issued: 05/22/1979
  • Est. Priority Date: 05/03/1976
  • Status: Expired due to Term
First Claim
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1. In a mobile spreader pulled by a tractor and controlled by an operator, having a rigid frame supported on at least one roller having a generally cylindrical ground-contacting surface having a hopper carried by said frame, said hopper having converging walls defining a cavity to receive material to be spread, and having a rectangular bottom outlet disposed in a generally horizontal plane and elongated in a direction generally transverse the direction of motion of the mobile spreader, the combination comprising:

  • (a) jarring means associated with the ground-contacting surface of the roller for rotation with it and including a jarring means ground-contacting surface located at a radial distance from the roller axis sufficiently different from that of the generally cylindrical surface of the roller as to impart a jolt to the hopper, as the jarring means ground-contacting surface contacts the ground, of sufficient force to prevent the formation of bridges of said material within the hopper when moist material is being spread;

    (b) a rotatable impellor, said impellor comprising a first shaft extending through said hopper closely above and parallel to the elongated direction of said outlet, said impellor including a plurality of blades spaced from each other along the length of said first shaft, and extending radially outwardly from said first shaft, each of said blades being of such limited length as to avoid contact with any part of the hopper, said first shaft being connected to the roller for rotation by said roller; and

    ,(c) a rotatable agitator comprising a second shaft extending through the hopper parallel to the first shaft and spaced a substantial distance thereabove, said second shaft being connected to said first shaft for rotation with said first shaft in the same direction, said second shaft having a plurality of elements spaced from each other along the length of said second shaft and extending perpendicularly to said second shaft, said elements being thinner and longer than the blades on the first shaft, and of such length and spacing as, when the agitator is rotated, to sweep between pairs of radiating blades of the first shaft, thereby to break up any build-up of material which may occur in the hopper or bridging of said material about the area of the hopper swept by the blades of the rotatable impellor, said jarring means cooperating with said rotatable agitator to shake the material to be spread into the region swept by the elements of said rotatable agitator.

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