Run-flat tire with an improved bead to rim interface
First Claim
1. A radial run-flat tire comprising:
- a pair of sidewall portions;
a plurality of crescent shaped sidewall members in each sidewall portion for supporting said tire with a loss of inflation pressure;
a pair of spaced apart annular beads;
a pair of radially reinforced carcass layers extending from bead to bead and disposed about said crescent shaped sidewall members;
a middle carcass layer extending from bead to bead between crescent shaped members and having both ends partially encircling a respective bead core and turned-up around said bead core to lap with an outermost one of said pair of carcass layers; and
first and second bead fillers each disposed radially outward of each bead core and axially between carcass layers, said first bead filler extending radially outward from said bead core to form one sidewall member of said plurality of crescent shaped sidewall members and said second bead filler bounded by said first bead filler and said bead core for providing a filler material adjacent the bead core with a lower hardness than that of the first bead filler.
2 Assignments
0 Petitions
Accused Products
Abstract
The run-flat tire has a tread for contacting a ground surface and a belt package with belt plies interior to the tread for support of the tread. A plurality of radially reinforced carcass layers are positioned interior to the belt plies and include at least one carcass layer that extends between spaced apart annular beads. The tire has a pair of sidewalls each extending radially inward from shoulders at lateral edges of the belt package to the annular beads. The sidewalls have a plurality of sidewall stiffening members to support the tire during a loss of inflation pressure. The carcass layers are disposed with the sidewall stiffening members to help support the run-flat tire with a loss of inflation pressure. The spaced apart beads have a unique design including bead cores placed at a predetermined diameter with respect to a rim diameter, dual bead fillers above the bead cores, a heel corner spaced at a radial gap distance from a rim flange and rim interface components having a seat interface distance below the bead core for mounting the run-flat tire on a conventional rim and for sustaining the run-flat tire on the conventional rim with a loss of inflation pressure within the run-flat tire.
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Citations
9 Claims
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1. A radial run-flat tire comprising:
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a pair of sidewall portions; a plurality of crescent shaped sidewall members in each sidewall portion for supporting said tire with a loss of inflation pressure; a pair of spaced apart annular beads; a pair of radially reinforced carcass layers extending from bead to bead and disposed about said crescent shaped sidewall members; a middle carcass layer extending from bead to bead between crescent shaped members and having both ends partially encircling a respective bead core and turned-up around said bead core to lap with an outermost one of said pair of carcass layers; and first and second bead fillers each disposed radially outward of each bead core and axially between carcass layers, said first bead filler extending radially outward from said bead core to form one sidewall member of said plurality of crescent shaped sidewall members and said second bead filler bounded by said first bead filler and said bead core for providing a filler material adjacent the bead core with a lower hardness than that of the first bead filler. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification