Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1996-12-23
1998-11-17
Maki, Steven D.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
B60C 1103, B60C10100, B60C10300, B60C10500
Patent
active
058370749
ABSTRACT:
A pneumatic tire with an improved tread portion capable of reducing a pass-by noise with improving wet performances is disclosed, wherein a central region Y1 of the tread between a pair of first circumferential lines X1 is provided with a wide circumferential groove having a width W1 of from 0.05 to 0.15 times the ground contacting width TW; a pair of middle regions Y2 between the first circumferential lines X1 and second circumferential lines X2 and a pair of shoulder regions Y3 axially outward of the second circumferential lines X2 are not provided with a circumferential groove but axial grooves, the axial grooves extending from the central region Y1 to tread edges and intersect the first circumferential lines X1 at an angle .theta.1 of from 10 to 25 degrees and the second circumferential lines X2 at an angle .theta.2 of from 30 to 45 degrees; and each first circumferential line X1 drawn on each side of the tire equator at an axial distance L1 of 0.1 to 0.15 times the width TW, and each second circumferential lines X2 drawn on each side of the tire equator at an axial distance L2 of from 0.325 to 0.375 times the width TW.
REFERENCES:
patent: 4057089 (1977-11-01), Johannsen
patent: 4700762 (1987-10-01), Landers
patent: 4726407 (1988-02-01), Hayakawa et al.
patent: 5131443 (1992-07-01), Kuhr et al.
patent: 5154783 (1992-10-01), Kuhr et al.
patent: 5176766 (1993-01-01), Landers et al.
patent: 5234042 (1993-08-01), Kuhr et al.
patent: 5421389 (1995-06-01), Favre et al.
patent: 5501258 (1996-03-01), Sulkowski
Abstract for Europe 588781.
Maki Steven D.
Sumitomo Rubber Industries Ltd.
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