Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1990-08-08
1992-05-12
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152533, 152536, B60C 900, B60C 918
Patent
active
051118637
ABSTRACT:
Pneumatic tire is provided with a belt layer including a first belt ply of which width is more than 0.9 times and less than 0.95 times the tread width and a second belt ply of which width is more than 0.88 times and less than 0.92 times the tread width, that are arranged in sequence from a carcass side.
One of the belt plies is composed of two belt ply parts which are separated by a gap on the tire's equator. The other belt ply is composed of a middle belt ply part and two side-belt ply parts which are separated by a gap at two division points each spaced apart from the equator in the axial direction by a distance of 0.2 to 0.3 times the other belt ply width.
Initial elasticity EA of the middle belt ply part is preferably larger than the initial elasticity EB of the other belt ply parts, especially, the ratio EA/EB is more preferably 2.0 or more and 4.0 or less.
The gaps are preferably 0.5 mm to 4.0 mm.
REFERENCES:
patent: 3083749 (1963-04-01), Destinay et al.
patent: 3342239 (1967-09-01), Olagnier
patent: 3467161 (1969-09-01), Menell et al.
patent: 3712362 (1973-01-01), Alderfer
patent: 3850219 (1974-11-01), Snyder
patent: 4077454 (1978-03-01), Miyoshi et al.
patent: 4184530 (1980-01-01), Mirtain
patent: 4258774 (1981-03-01), Mirtain et al.
patent: 4696335 (1988-09-01), Tsukagoshi et al.
Ball Michael W.
Johnstone Adrienne C.
Sumitomo Rubber Industries Ltd.
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