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Semi-hollow pneumatic tire for agricultural machines, in particular for sowing machines

  • US 10,179,480 B2
  • Filed: 04/10/2014
  • Issued: 01/15/2019
  • Est. Priority Date: 04/12/2013
  • Status: Active Grant
First Claim
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1. A semi-hollow pneumatic tire for an agricultural machine, having an axis of revolution and comprising:

  • a sole mountable on the periphery of a rotary support,a tread opposite the sole, andtwo sidewalls each connecting the sole and the tread so as to form together a cover which defines an uninflated chamber inside the pneumatic tire,wherein the tread has a concave profile according to a plane passing through the axis of revolution, andwherein the pneumatic tire comprises two annular ridges which are connected to two opposite ends of the tread and which extend beyond intersections of the sidewalls and the tread in the outer radial direction, the two annular ridges including end edges and defining, respectively, two principal directions which intersect the end edges perpendicularly and intersect one another at an acute angle so that, when the pneumatic tire comes into contact with soil, by being subjected to a vertical load, the two annular ridges move closer together locally in such a manner as to exert a pinching effect on the soil, causing an increase in the concavity of the tread and an increase in the angle.

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