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US 8,136,562 B2Granted
Tire bead insulation
AssigneeBridgestone/Firestone North American Tire, LLC
InventorJohn F. Pawlikowski
Life of this patent
Estimating the term…
Abstract
A tire includes bead insulation compound that is formed by combining a rubber component, a bituminous hydrocarbon resin, and a processing oil that includes naphthenic oil.
Claims9
A tire comprising:
- a tread portion;
- a pair of axially spaced bead portions;
- a pair of sidewall portions, each extending between the tread portion and one of the bead portions;
- a carcass extending between the bead portions, through the sidewall and tread portions;
- and
- a belt package disposed radially outside the carcass in the tread portion, where said bead portions each comprise a bead core and bead insulation compound, where the bead insulation compound is formed by combining a rubber component, from about 2 to about 12 phr of bituminous hydrocarbon resin based upon the total weight of rubber in the bead insulation compound, and a processing oil, where the processing oil comprises naphthenic oil or a blend of oils including naphthenic oil, and where the processing oil comprises less than about 20 phr of highly aromatic oil, based upon the total weight of rubber in the bead insulation compound.
3 more elements
Dependencies are inferred from the claim text.