Run flat pneumatic tire and anticlastic band element therefor
AssigneeBridgestone/Firestone North American Tire, LLC
InventorsCharles D. Spragg, Stephen M. Vossberg, James M. Kirby, Edward G. Markow
Life of this patent
Estimating the term…
Abstract
A run flat pneumatic tire has a thin annular band embedded in the crown portion of the tire. The band is formed of a composite material such as tows of fiberglass and/or graphite material impregnated with a resin. The resin coated tows are wound about a mandrel having at least one concave recess to provide the band with an anticlastic shape with an arcuate cross section and a concave surface facing radially outwardly.
Claims12
A run flat pneumatic tire including an elastomeric casing with a tread formed in a crown portion thereof and sidewalls extending from the crown portion to beads for seating said tire on a wheel;
- and a thin annular resilient band formed of a composite material having an anticlastic shape with an arcuate cross section and a concave surface facing radially outwardly embedded in the crown portion of the tire, said band having a radial thickness “T” and a concavity within the range of about 0.1 to about 2.0 times the thickness “T”.
A run flat pneumatic tire including an elastomeric casing with a tread formed in a crown portion thereof and sidewalls extending from the crown portion to beads for seating said tire on a wheel;
- and a thin annular resilient band formed of a composite material having an anticlastic shape with an arcuate cross section and a concave surface facing radially outwardly embedded in the crown portion of the tire, said composite material being a multilayer composite formed of wound layers of material impregnated with a heat solidifiable resin, said layers being helically wound at an angle of between ±85° and ±75°.
Dependencies are inferred from the claim text.