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Agricultural tire and tread lug therefor

  • US 5,010,935 A
  • Filed: 10/11/1989
  • Issued: 04/30/1991
  • Est. Priority Date: 10/11/1989
  • Status: Expired due to Term
First Claim
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1. A pneumatic tire for agricultural use having a tread including an inner tread surface and a plurality of spaced tread lugs, the inner tread surface being spaced between tread lugs, each of the lugs having at least one sidewall, and in cross-section comprising:

  • a first substantially straight portion extending radially inwardly from a cutting edge of a radially outermost surface of said lug at a first angular inclination in the range of 0°

    to 5°

    with respect to the radial direction;

    a second substantially straight portion extending radially inwardly at a second angular inclination in the range of 12°

    to 25°

    with respect to the radial direction;

    a first concave curved portion extending from said first straight portion to the second straight portion;

    a second concave curved portion extending radially inwardly from the second straight portion to the inner tread surface; and

    wherein each of such lugs is spaced apart from another of such lugs by a distance of at least 12% to about 15% of the tread width and wherein the net-to-gross ratio of the tire is in the range of 25% to 40%.

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