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Single grain sowing machine

  • US 4,628,841 A
  • Filed: 10/09/1984
  • Issued: 12/16/1986
  • Est. Priority Date: 10/10/1983
  • Status: Expired due to Fees
First Claim
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1. A single grain sowing machine comprising a housing, a seed container, a feeding wheel in the form of a disc rotatable within the housing about a substantially horizontal axis, said feeding wheel having a plurality of radially outwardly open cells spaced around its periphery that are also open on both sides of the cells, said feeding wheel and being of a thickness in the region of the cells no larger than the smaller diameter of the seed grains, said seed container delivering a plurality of seeds to a filling zone on one side of said feeding wheel, while the other side of the wheel is bounded by a wall of the housing whereby the cells receive individual seed grains at the filling zone, and rotation of the feeding wheel transports the seeds in the cells one at a time away from the filling zone to a transfer zone where the feeding wheel projects out of the housing, a sowing wheel also rotatable about a substantially horizontal axis transverse to the driving direction of the sowing machine that cooperates with the feeding wheel in the transfer zone to receive individual seed grains from the cells of the feeding wheel in an upper zone of the path of rotation of the sowing wheel and which discharges them into the soil in a lower zone, said sowing wheel being provided around its circumference with resilient clamping elements which define between each other a circumferentially extending gap that receives the peripherial portion of the feeding wheel in the transfer zone, said resilient elements exerting pressure toward each other to grip a seed in a cell of the feeding wheel as the wheels rotate and the feeding wheel passes through the gap to thereby remove the seeds one at a time from the cells, said clamping elements also being resilient in the radial direction so that as the sowing wheel rotates to the lower zone, the elements are pressed against the soil whereby the elements deform to release the seeds which are then pressed into the soil by the pressure of the sowing wheel.

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