Resilient tires and wheels – Tires – resilient – Anti-skid devices
Reexamination Certificate
2002-12-13
2009-06-09
Maki, Steven D (Department: 1791)
Resilient tires and wheels
Tires, resilient
Anti-skid devices
C152S209140, C152S209180, C152S454000, C152S526000, C152S538000
Reexamination Certificate
active
07543616
ABSTRACT:
A heavy duty tire has a tread portion2which is divided into five inner, intermediate and outer rib-like land portions R1, R2, R2, R3and R3. The inner rib-like land portion R1is virtudally divided into half regions R1aand R1aon each side of a tire equator. The intermediate rib-like land portions R2and R3are virtually divided into tire equator-side half regions R2cand R3c, and into ground-contact edge-side half regions R2eand R3e. In a regular ground-contact state in which a normal load is applied, when total sums of ground-contact load applied to the half regions R1a, R2c, R2e, R3cand R3eare defined as P1a, P2c, P2e, P3cand P3e,P2c/P1ais set to 0.9 to 1.05,P2e/P2cis set to 0.75 to 1.0,P3c/P2eis set to 0.9 to 1.2, andP3e/P3cis set to 0.8 to 1.1.
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Kimishima Takahiro
Maruoka Kiyoto
Nishi Minoru
Tsuda Satoshi
Yamahira Atsushi
Birch & Stewart Kolasch & Birch, LLP
Maki Steven D
Sumitomo Rubber Industries Ltd.
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