B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 9/08 (2006.01) B60C 11/11 (2006.01) B60C 15/00 (2006.01) A01C 23/00 (2006.01) A01M 7/00 (2006.01)
Patent
CA 2551748
The invention is directed to a high aspect ratio agricultural pneumatic tire having a tread, a belt reinforcing structure and a carcass. The tread includes a circumferential inner tread and a plurality of lugs each projecting radially outward from the inner tread. The belt reinforcing structure includes four or more belt layers reinforced by synthetic cords and underlying the tread. The carcass has a pair of bead portions each having a core and a bead filler above each bead core and two pair of first and second carcass plies. Each ply is reinforced by synthetic cords oriented radially and wrapped from the inside of each bead core around to an axially outer turnup end. The first pair of plies is radially inward and adjacent the second pair of plies between the bead cores and having the turnup ends wrapped about the bead cores and the turnup end of the second pair of plies. The turnup end of the first pair of plies extends outwardly and radially along said bead filler to a terminal end T1, T1' and said turnup ends of said second pair of plies extends to turnup ends T2, T2'wherein T1, T1'are located between 60% and 80% of a location Y defined as the radial location of maximum section width (SW) of the tire and the second pair of plies have the terminal ends T2, T2' extend above the bead cores to a location 30% to 50% of Y. The aspect ratio is preferably greater than 85%, more preferably about 90% or greater. The ply cords are nylon and the belt cords are aramid to form a substantially synthetic textile carcass.
Mcgaffick Thomas Edward
Rielly Kevin Michael
Sim & Mcburney
The Goodyear Tire & Rubber Company
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