发明名称 |
TIRE CONSTRUCTION UTILIZING LOW-TWIST BODY PLY YARN WITH LOW TURN-UP ENDS |
摘要 |
A pneumatic radial ply tire in which the body ply is formed of a low twist yarn having between three and six turns-per-inch. The body ply terminates in relatively low turn-up ends extending along the side walls a distance between 10% and 30% of the tire section height and out of the area of cyclic stress and oscillation in the side walls of the tire. A relatively high, wide and hard bead filler is located within a bead portion of the tire and has a height between 20% and 50% of the tire section height with a width of between 15% and 35% of the bead filler height. The bead filler has a hardness of between 75 and 98 on the Shore A scale. The ply yarn preferably is polyester and the individual low twist strands are arranged in a parallel relationship and is preferably free of transverse cross strands known as wefts or picks. The combination of low twist yarn, low turn-up body ply ends and bead filler size and hardness provides a tire having increased durability and uniformity at a lower cost. |
申请公布号 |
ZA8506793(B) |
申请公布日期 |
1986.04.30 |
申请号 |
ZA19850006793 |
申请日期 |
1985.09.04 |
申请人 |
THE FIRESTONE TIRE & RUBBER COMPANY |
发明人 |
THOMAS W. BELL;LOUIS W. SHURMAN |
分类号 |
B60C9/02;B60C9/00;B60C9/08;B60C15/00;B60C15/04;B60C15/06 |
主分类号 |
B60C9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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