Runflat tire with sidewall-reinforcing inserts
AssigneeBridgestone Americas Tire Operations, LLC
InventorJames M. Kirby
Life of this patent
Estimating the term…
Abstract
A run-flat tire having a tread, an inner liner disposed beneath the tread, a body ply, and a pair of sidewalls axially spaced apart from one another is disclosed. The run-flat tire further includes a pair of sidewall-reinforcing portions each disposed in respective sidewall regions and each having a fabric barrier; a first sidewall-reinforcing insert between the fabric barrier and the inner liner; and a second sidewall-reinforcing insert disposed between the fabric barrier and the body ply. The fabric barrier extends not more than an entire length of the sidewall-reinforcing portion.
Claims20
A run-flat tire comprising:
- a tread;
- an inner liner disposed beneath the tread;
- a first sidewall region including a first sidewall, and a second sidewall region including a second sidewall, each of the first and second sidewalls axially spaced apart from one another and extending from the respective first and second ends of the tread;
- a first bead portion and a second bead portion axially spaced apart from one another, each bead portion having a bead core and a bead filler;
- at least one body ply:
- having a main body ply portion extending circumferentially about the tire, at least a portion of the main body ply portion disposed between the tread and the inner liner;
- and
- having a first turned-up portion and a second turned-up portion, the first turned-up portion looping around the first bead portion and the second turned-up portion looping around the second bead portion;
- and
- a pair of sidewall-reinforcing portions each disposed in respective sidewall regions and each having:
- a fabric barrier of parallel, biased cords, the fabric barrier disposed to divide a standard-sized insert into two equal-sized smaller inserts and the fabric barrier configured to redirect a horizontal tear resulting from stresses in a zero psi state along a length of the fabric barrier, the two equal-sized smaller inserts including;
- a first sidewall-reinforcing insert disposed within a respective sidewall region between the fabric barrier and the inner liner;
- and
- a second sidewall-reinforcing insert disposed within a respective sidewall region between the fabric barrier and the at least one body ply, the fabric barrier disposed directly between and contacting each the first and the second insert and extending not more than an entire length of either of the first and second insert.
A run-flat tire comprising:
- a tread having a first end and a second end, opposite the first end;
- an inner liner disposed beneath the tread;
- a first sidewall region including a first sidewall, and a second sidewall region including a second sidewall, each of the first and second sidewalls axially spaced apart from one another and extending from the respective first and second ends of the tread;
- a first bead portion and a second bead portion axially spaced apart from one another, each bead portion having a bead core and a bead filler;
- at least one body ply:
- having a main body ply portion extending circumferentially about the tire and disposed between the tread and the inner liner;
- and
- having a first turned-up portion and a second turned-up portion, the first turned-up portion looping around the first bead portion and the second turned-up portion looping around the second bead portion;
- and
- a pair of sidewall-reinforcing portions each disposed in respective sidewall regions and each having:
- a fabric barrier of parallel, biased cords, the fabric barrier disposed to divide a standard-sized insert into two equal-sized smaller inserts and the fabric barrier configured to redirect a horizontal tear resulting from stresses in a zero psi state along a length of the fabric barrier, the two equal-sized smaller inserts including;
- a first sidewall-reinforcing rubber insert disposed within a respective sidewall region between the fabric barrier and the inner liner;
- and
- a second sidewall-reinforcing rubber insert disposed within a respective sidewall region between the fabric barrier and the at least one body ply, the fabric barrier disposed directly between and contacting each the first and the second sidewall-reinforcing inserts and the fabric barrier extending not more than an entire length of either of the first and second sidewall-reinforcing inserts.
Dependencies are inferred from the claim text.