US 5,851,324 AGranted

Radial ply pneumatic tire

AssigneeThe Goodyear Tire & Rubber Company

InventorsThomas Reed Oare, Randall Raymond Brayer, Jeffrey Wayne Kahrs, Beale Anthony Robinson, Keith Carl Trares, Raymond Dean Mc Quate

Life of this patent

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Abstract

A radial ply pneumatic tire has a carcass with a bead portion, a carcass reinforcing structure, and a bead filler. The carcass reinforcing structure has at least two plies. The turnup ends of a first or a second ply are wrapped about each bead and terminates in radial proximity of the maximum section width of the tire. In a preferred embodiment of the invention, the tire carcass includes elastomeric first and second filers the first filler being located between the first ply and the innerliner of the tire, and the second filer being located between the first and second ply. The fillers stiffen the sidewalls to permit the tire to be driven while uninflated. The tire may further include an aramid overlay radially outwardly of the reinforcing belt.

Claims37

Dependent claims

A radial ply pneumatic tire having an axis of rotation, a tread having a pair of lateral edges, a pair of reinforcing belts located radially inward of the tread, a pair of sidewalls, one sidewall extending radially inwardly from each lateral edge, a maximum section width, and a tire carcass structure, the tire carcass structure comprising:

a) a pair of bead portions, one lead portion extending radially inwardly from each sidewall, each portion including a substantially inextensible core;
b) a carcass reinforcing structure radially inward of the reinforcing belts extending circumferentially about the tire from one bead portion to the other bead portion, the carcass reinforcing structure having a first ply structure and a second ply structure, each ply structure laving at least one ply, each ply having an elastomeric ply coat and ply cords which extend from bead to bead;
c) an innerilner radially inward of the first ply structure;
d) a fabric reinforced overlay being radially outward of the reinforcing belts;
e) a pair of bead fillers, one of the bead fillers being located above each bead core;
and
f) a pair of first fillers and a pair of second fillers, the first fillers being located between the innerliner and the first ply structure, one first filler extending from each bead portion radially to beneath the reinforcing belts, the second fillers being disposed between the first and second ply structures, one second filler extending radially outward from each bead portion to beneath the reinforcing belts, the first fillers having a Shore A Hardness of about 60 to about 70.

4 more elements

a) a pair of bead portions, one bead portion extending radially inwardly from each sidewall, each portion including a substantially inextensible core;
b) a carcass reinforcing structure radially inward of the reinforcing belts extending circumferentially about the tire from one bead portion to the other bead portion, the carcass reinforcing structure having a first ply structure and a second ply structure, each ply structure having at least one ply, each ply having an elastomeric ply coat and ply cords which extend from bead to bead;
c) an innerliner radially inward of the first ply structure;
d) a fabric reinforced overlay being radially outward of the reinforcing belts;
e) a pair of bead filers, one of the bead fillers being located above each bead core;
and
f) a pair of first fillers and a pair of second fillers, the first fillers being located between the innerliner and the first ply structure, one first filler extending from each bead portion radially to beneath the reinforcing belts, the second fillers being disposed between the first and second ply structures, one second filler extending radially outward from each bead portion to beneath the reinforcing belts, the second fillers having a Shore A Hardness of about 60 to about 70.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/239,055Filed 6 May 1994 · division
Priority: 30 Sep 1992
Granted: 22 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B60C 15/04
Tyre beads, e.g. ply turn-up or overlap: bead cores
B60C 13/00
Tyre sidewalls
B60C 15/06
Tyre beads, e.g. ply turn-up or overlap: flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
B60C 17/0018
Comprising sidewall rubber inserts, e.g. crescent shaped inserts: two or more inserts in each sidewall portion