Pneumatic tire with directional tread

Details Pneumatic tire with directional tread Pneumatic tire with directional tread

1990-01-19

1991-09-03

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1104

Patent

active

050444140

ABSTRACT:
To improve high-speed durability of the pneumatic tire formed with a directional tread such that transversal grooves are arranged into a herringbone pattern at regular intervals along the tire circumferential direction, the U-shaped cross section of each of the transversal grooves is formed in such a way that a radius (R.sub.1) of curvature of a step-out side corner between a side wall and a bottom of each transversal groove which is first brought into contact with the ground along a tire rotating direction is determined smaller than that (R.sub.2) of a kick-out side corner therebetween which is afterward brought into contact with the ground at a ratio of about 2 to 5.

REFERENCES:
patent: 4177850 (1979-12-01), Ogawa et al.
patent: 4284115 (1981-08-01), Ohnishi
patent: 4299264 (1981-11-01), Williams
patent: 4732194 (1988-03-01), Saneto et al.
patent: 4819704 (1989-04-01), Misawa et al.
patent: 4877072 (1989-10-01), Fontaine

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