Pneumatic tire

Details Pneumatic tire Pneumatic tire

1990-08-08

1992-04-21

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

D12147, B60C 1106

Patent

active

051058642

ABSTRACT:
This invention relates to a pneumatic tire equipped on its tire tread surface with a plurality of main grooves extending in a tire circumferential direction and transverse grooves extending from the center portion to shoulder portions while crossing the main grooves. The radius r of an approximate arc approximating to the ground contact front edge line of the tire tread surface has a relation r.ltoreq.2w with the ground contact width w, the direction of the main grooves has an angle within a range of .+-.10.degree. with respect to the normal of the approximate arc and the main grooves are disposed also in the shoulder portions outside 40 % from the center of the tire tread surface besides the center portion.

REFERENCES:
patent: D190985 (1961-07-01), Blankenship
patent: 4057089 (1977-11-01), Johannsen
patent: 4962801 (1990-10-01), Tsuda

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