Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1984-11-28
1987-12-29
Ball, Michael
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
57902, 152535, B60C 900, D07B 106
Patent
active
047154195
ABSTRACT:
A large-size pneumatic radial tire for use on rough road is disclosed, which comprises as a tire reinforcement a carcass ply of cords arranged in a direction substantially perpendicular to the equatorial plane of the tire and a belt composed of at least three cord layers each containing steel cords embedded parallel to each other in rubber and arranged at a relatively small angle with respect to the equatorial plane of the tire, at least a pair of adjacent cord layers among which being piled one upon the other to cross their cords with each other at an angle of 15.degree.-30.degree. with respect to the equatorial plane. In this type of the tire, the outermost cord layer for the belt is a cord layer formed by embedding a plurality of twisted steel cords, each having a single layer construction of 1.times.3, 1.times.4 or 1.times.5 or a double layer construction with a core of 1 to 2 filaments obtained by twisting plural steel filaments shaped prior to the formation of cord, in rubber at a cord volume fraction of 5-40% so as to provide a sealing type penetration form wherein a portion of the cord having an inner space completely filled with the penetrated rubber and a length l.sub.1 is alternately connected with a portion of the cord having an inner space incompletely filled with the penetrated rubber and a length l.sub.2 in the longitudinal direction of the cord so as to satisfy l.sub.2 of not more than 10 mm and l.sub.1 /l.sub.2 of not less than 0.14.
REFERENCES:
patent: 4258543 (1981-03-01), Canevari et al.
patent: 4333306 (1982-06-01), Yamashita et al.
patent: 4399853 (1983-08-01), Morimoto et al.
patent: 4488587 (1984-12-01), Umezawa et al.
patent: 4506500 (1985-03-01), Miyauchi et al.
patent: 4509318 (1985-04-01), Yoneda
Kawasaki Kiyohito
Koseki Hiroyuki
Matsunuma Tamotsu
Sato Michitaka
Ball Michael
Bridgestone Corporation
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