Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1992-10-21
1994-01-11
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152454, B60C 304, B60C 300, B60C 1106
Patent
active
052772357
ABSTRACT:
A pneumatic radial tire has a tread surface extending along a specific curvature plane which includes a first arc with the radius R1 having a center on the tire's equatorial plane and passing through the tire's equatorial point, a second arc with the radius R2 having a center on the tire's equatorial plane and intersecting with the first arc at an intersection distant from the tire's equatorial plane by 0.2 to 0.25 times the tire width SW, and a third arc with the radius R3 passing through a ground contact outer edge point of the ground contact surface, when a standard load is applied, and a belt intermediate height point on the tread surface. The tread surface is provided with a main circumferential groove, preferably having a groove width of 0.06 to 0.10 times the tire width SW, extending near said intersection of the first arc and the second arc in the tire circumferential direction for dividing the tread surface into the crown part and an outer shoulder part. Narrow lateral grooves crossing the tire circumferential direction divide the crown part and shoulder part into blocks.
Asano Kazuo
Kajikawa Akira
Saito Kenji
Ball Michael W.
Johnstone Adrienne C.
Sumitomo Rubber Industries Ltd.
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