B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
152/124
B60C 11/04 (2006.01) B60C 9/18 (2006.01)
Patent
CA 1094437
Abstract of the Disclosure A pneumatic radial tire for heavy vehicles comprising in combination two wide zigzag circumferential main grooves for dividing a tread into a center region and two side regions, a narrow zigzag groove for dividing each region into two portions, and a branch groove located in the center region and connected to the main and narrow grooves to define blocks and satisfying the following requirements, i.e. 1) each main groove has a width which is 5 to 9% of the width of the tread, is substantially U-shaped in cross- section and has a wall defined by a bent or wavy line whose pitch is 0.3 to 1.3 times the width of the main groove and a swing width within a range from 0.1 to 1.0 times the width of the main groove and 2) the branch groove has a depth which is 14 to 36% of the depth of the main groove.
324740
Aoki Shigeta
Makino Shigeo
Sugimura Noboru
Bridgestone Tire Company Limited
Swabey Ogilvy Renault
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