Pneumatic radial tire with spiral belt layer for two-wheeled...

Details Pneumatic radial tire with spiral belt layer for two-wheeled... Pneumatic radial tire with spiral belt layer for two-wheeled...

2011-05-03

2011-05-03

Johnstone, Adrienne C (Department: 1747)

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

C152S531000, C152S533000

Reexamination Certificate

active

07934527

ABSTRACT:
Provided is a pneumatic radial tire including a carcass layer composed of a carcass ply12and a spiral belt layer26composed of steel cords wound spirally substantially in parallel with each other to a tire equator surface. When the ratio of spacing R1between adjacent steel cords of the spiral belt layer26is shown by R1=(50−E×ds)/50, the ratio of spacing R1is 0.45 or less as well as the total sectional area S of the steel cords applied per 50 mm width of the spiral belt layer is 7.5 mm2or less (E shows the number of steel cords applied per 50 mm width of the spiral belt layer, and ds shows the diameter (mm) of each steel cord). The number of steel cords E applied per 50 mm of width ranges from 66 to 200.

REFERENCES:
patent: 7213627 (2007-05-01), Matsunami
patent: 2002/0050314 (2002-05-01), Nakamura
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patent: 2002-059707 (2002-02-01), None
patent: 2004-067058 (2004-03-01), None
patent: WO 2002/051652 (2002-07-01), None

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