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US 2008/0163971 A1Published application
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.
Claims22
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, bituminous hydrocarbon resin, 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
A tire comprising:
- a tread portion;
- a pair of axially spaced bead portions;
- a pair of sidewall portions 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 portion comprises a bead core and bead insulation compound, where the bead insulation compound is formed by combining a rubber component, bituminous hydrocarbon resin, and a processing oil, and vulcanizing said rubber component, where said bead insulation compound comprises less than about 20 phr aromatic oil, based upon the total weight of rubber in the bead insulation compound, and where said bead insulation compound is characterized by a metal adhesion index of at least 100 when compared to a bead insulation compound containing greater than 20 phr aromatic processing oil and no bituminous hydrocarbon resin.
3 more elements
Dependencies are inferred from the claim text.