Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1988-10-13
1990-05-29
Hoch, Raymond
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152538, B60C 918
Patent
active
049287427
ABSTRACT:
A pneumatic radial tire, which comprises a carcass of at least one ply of radially arranged cords turned up around bead cords from the inside to the outside thereof, and a breaker disposed radially outside the carcass, the breaker comprising at least two radially adjacent plies of cords, the breaker having at least a portion in which the cords of each of the two plies are inclined with respect to an equatorial plane of the tire and the cords of one ply are inclined oppositely to the cords of the other ply, the cords of each of the breaker plies being so arranged that the cord angle QC in a crown portion of the breaker with respect to the equatorial plane differs from the cord angle QS in each of the shoulder portions of the breaker with respect to the equatorial plane, wherein the crown portion is centered on a tire equator and has a width of 0.4 to 0.8 times the maximum width of the breaker, and the shoulder portions are located one on each side of the crown portion, whereby both steering stability and ride comfort are improved in a well balanced manner.
REFERENCES:
patent: 2958359 (1960-11-01), Boussu et al.
patent: 3335777 (1967-08-01), Hutch
patent: 3677319 (1972-07-01), Mirtain
patent: 4407347 (1983-10-01), Mirtain
Iwamura Kazumitsu
Oku Masahiro
Hoch Raymond
Sumitomo Rubber Industries Ltd.
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