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US 6,634,398 B1Granted
Chip resistance tire
AssigneeThe Goodyear Tire & Rubber Company
InventorsJerry Malin, Subhash Chander Agarwal, Michael John Roon, Dale Eugene Wells
Life of this patent
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AssigneeThe Goodyear Tire & Rubber Company
InventorsJerry Malin, Subhash Chander Agarwal, Michael John Roon, Dale Eugene Wells
Estimating the term…
A chip resistant pneumatic tire (10) is provided. The tire has an original reinforced rubber sheet (22, 22b) embedded in or under its tread (18) and/or sidewall (20 ), and is used in off the road applications such as mining. Low sulfur rubber (17) is used to coat the organic reinforcement (11), and its shown that such rubber (17) is more compatible with rubber used to form the tread (18) or sidewall (20), which together with the organic reinforcement (11), helps prevent chipping and chunking in the tread (18) and sidewall (20). The illustrated organic filaments of cords (11) have a round cross section and are at least 2000 denier (2200 dTex) and have a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 20 g/denier (177 cN/Tex), an elongation at break of at least 10%, and a shrinkage of at most 10%.
A pneumatic tire (10) comprising at least a pair of parallel annular beads (12), carcass plies (14) wrapped around said beads (12), steel belts or breakers (16) comprising steel cords coated in high sulfur rubber disposed over said carcass plies (14) in a crown area of the tire (10), tread (18) disposed over said steel belts or breakers (16), and sidewalls (20) disposed between said tread (18) and said beads (12), the improvement wherein a reinforced rubber sheet (22) comprising low sulfur rubber (17) reinforced with round organic filaments or cords (11) is disposed over said steel belts or breakers (16), the steel cords in the steel belts or breakers (16) being inclined at angles of 12° to 35° with respect to the equatorial plane of the tire, and the organic filaments or cords (11) form an angle of 50° to 70° with respect to the equatorial plane of the tire, said organic filaments or cords (11) being at least 2000 denier (2200 dTex) and having a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 20 g/denier (177 cN/Tex), an elongation at break of at least 10% and a shrinkage of at most 10%.
Dependencies are inferred from the claim text.