Aircraft tire with improved bead structure
AssigneeThe Goodyear Tire & Rubber Company
InventorKiyoshi Ueyoko
Life of this patent
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Abstract
A pneumatic radial ply tire 100 for use on aircraft has a radial reinforced carcass 20 having at least one axially inner ply 2A, 2B, 2C and 2D of textile cords 21 wound around a pair of bead cores 33. The improved bead structure 30 has a flipper 50 having an axially inner leg LI and axially outer leg LE. The ends LI, LE of the flippers 50 are above the bead core height Bh and below the apex A of an elastomeric strip 40 satisfying the relation Bh<LE<0.7 D and Bh<LI<0.7 D. Additionally, the tire carcass 20 has at least one axially outer ply 2E, 2F of textile cords 21 extending from bead 30 to bead 30 along the turn-ups 20A, 20B, 20C and 20D of the axially inner plies 2A, 2B, 2C and 2D. The plies 21 are closely spaced along the natural ply path.
Claims2
A pneumatic tire for use on aircrafts having a nominal bead diameter NBD, a tread, a crown reinforcement, and a radial carcass reinforcement comprising at least one axially inner ply of textile cord wound around a pair of bead cores, the bead cores have a radial height Bh, the at least one axially inner ply being wound around the bead core in each bead from inside to the outside forming outside turn-ups and at least one axially outer ply of textile cords extending from bead to bead along the turn-ups of the inner plies, each bead having an elastomeric filler of substantially triangular shape, the apex A of the filler being located above the bead core extending a distance D as measured from a line YY′ parallel to the axis of the tire and passing through the location of the nominal bead diameter, the tire further including a flipper wound around the bead core to form an axially inner leg and an axially outer leg, the axially inner leg being located at a radial distance li from the reference line YY′ and the axially outer end leg being located a radial distance Le from the reference line YY′, wherein LI>BH;
- and LE<0.7 D;
- and
- a chafer, partially surrounding the radially outermost cords wires of a bead core, the chafer having a radially inner first edge and a radially outer second edge, the first edge extending radially outwardly to a radial location RI, RI being between a radially innermost line P, P being parallel to the axis of the tire and tangent to the radially innermost location of bead core, and a distance less than 50% of the radial distance D;
- and the second edge of the chafer is located at a radial distance RE, RE being between a radially innermost line P tangent to a radially innermost surface of the bead core and a distance less than 50% of the radial distance D.
A pneumatic tire for use on aircrafts having a nominal bead diameter NBD, a tread, a crown reinforcement, and a radial carcass reinforcement comprising at least one axially inner ply of textile cord wound around a pair of beads, cores, the bead cores have a radial height Bh, the at least one axially inner ply being wound around the bead core in each bead from inside to the outside forming outside turn-ups and at least one axially outer ply of textile cords extending form bead to bead along the turn-ups of the inner plies, each bead having an elastomeric filler of substantially triangular shape, the apex A of the filler being located above the bead core extending a distance D as measured from a line YY′ parallel to the axis of the tire and passing through the location of the nominal bead diameter, the tire further including a flipper wound around the bead core to form an axially inner leg and an axially outer leg, the axially inner leg being located at a radial distance li from the reference line YY′ and the axially outer end leg being located a radial distance Le from the reference line YY′, wherein li>Bh;;
- and Le<0.7 D;
- and a chafer, partially surrounding the radially outermost cords wires of a bead core, the chafer having a radially inner first edge and a radially outer second edge, wherein the second edge of the chafer is located a radial distance RE, RE being between a radially innermost line P tangent to a radially innermost surface of the bead core and a distance less than 50% of the radial distance D.
Dependencies are inferred from the claim text.