Pneumatic radial tire with four main grooves

Details Pneumatic radial tire with four main grooves Pneumatic radial tire with four main grooves

1993-06-23

1995-07-25

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152209A, 152209D, B60C10100, B60C10304, B60C11100

Patent

active

054353645

ABSTRACT:
A pneumatic radial tire comprises four main grooves, shoulder lateral grooves (g1L, g1R), middle lateral grooves (g2L, g2R) and central lateral grooves (g3L, g3R); the central lateral grooves (g3L) on one side of the tire equator being circumferentially shifted from the central lateral grooves (g3R) on the other side of the tire equator; the middle lateral grooves (g2L, g2R) shifted from the central lateral grooves (g3L, g3R) towards a circumferential direction (D); the shoulder lateral grooves (g1L, g1R) shifted from the middle lateral grooves (g2L, g2R) towards the circumferential direction (D); the total (WG) of the axial widths (WG1, WG2) of the four main grooves being 0.25 to 0.32 times the ground contacting area width (W); on each side of the tire equator, the width (W) and the total (LG1+LG2) of the axial length (LG1) measured from the ground contacting area edge (SE) to the axially inner edge of the shoulder rib (RS) and the axial length (LG2) measured from the ground contacting area edge (SE) to the axially inner edge of the middle rib (RM) satisfying the following relation: 0.44.ltoreq. (LG1+LG2)/W.ltoreq. 0.50.

REFERENCES:
patent: D320772 (1991-10-01), Hasegawa
patent: D320969 (1991-10-01), Kobayashi et al.
patent: D330882 (1992-11-01), Hasegawa
patent: D342047 (1993-12-01), Takahashi
patent: 4057089 (1977-11-01), Johannsen
patent: 4456046 (1984-06-01), Miller
patent: 4676290 (1987-06-01), Tausei et al.
patent: 4700762 (1987-10-01), Landers
patent: 4884607 (1989-12-01), Mori
patent: 5152852 (1992-10-01), Hisamichi et al.

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