US4262726A — Radial tire with a low angle carcass overlay ply

Claim 1

Independent Claim 294 words

A tire comprising: (a) at least one carcass ply reinforced with cords which are radially oriented between beads of the tire; (b) a tread and pair of sidewalls surrounding the carcass ply and terminating at a pair of annular, inextensible beads; (c) a belt structure interposed between the tread and carcass ply for annularly reinforcing the tire, the belt structure comprising a pair of belt plies in superimposed relation, each of the belt plies being reinforced by parallel cords disposed at angles greater than 15 degrees relative to a plane containing the midcircumferential centerline of the tread, the reinforcement cords of the plies being substantially inextensible in all conditions of the tire and extending in different directions from said plane; (d) a carcass overlay disposed between the carcass ply and belt structure, the carcass overlay consisting of a single ply with opposing marginal edges which extend laterally beyond the belt structure, the carcass overlay being reinforced with continuous parallel cords which are disposed at angles in the range of from 0 to 13 degrees relative to said plane; and (e) said tire being manufactured by applying said beads and wrapping said carcass ply and said carcass overlay on a generally cylindrical tire building drum, removing said tire from said cylindrical tire building drum, shaping said tire to a toroidal configuration and elongating said reinforcement cords, applying said belt structure and said tread over said carcass overlay and thereafter molding and vulcanizing said tire, said reinforcement cords of said carcass overlay being substantially inextensible after the tire is toroidally shaped, and being elongatable in corresponding relation to the blow-up ratio of the tire when the carcass and attached overlay and cylindrically shaped prior to toroidal expansion and application of said belt structure and said tread.

Claim 2

Dependent Claim 294 words

A tire comprising: (a) at least one carcass ply reinforced with cords which are radially oriented between beads of the tire; (b) a tread and pair of sidewalls surrounding the carcass ply and terminating at a pair of annular, inextensible beads; (c) a belt structure interposed between the tread and carcass ply for annularly reinforcing the tire, the belt structure comprising a pair of belt plies in superimposed relation, each of the belt plies being reinforced by parallel cords disposed at angles greater than 15 degrees relative to a plane containing the midcircumferential centerline of the tread, the reinforcement cords of the plies being substantially inextensible in all conditions of the tire and extending in different directions from said plane; (d) a carcass overlay disposed between the carcass ply and belt structure, the carcass overlay consisting of a single ply with opposing marginal edges which extend laterally beyond the belt structure, the carcass overlay being reinforced with continuous parallel cords which are disposed at angles in the range of from 0 to 13 degrees relative to said plane; and (e) said tire being manufactured by applying said beads and wrapping said carcass ply and said carcass overlay on a generally cylindrical tire building drum, removing said tire from said cylindrical tire building drum, shaping said tire to a toroidal configuration and elongating said reinforcement cords, applying said belt structure and said tread over said carcass overlay and thereafter molding and vulcanizing said tire, said reinforcement cords of said carcass overlay being substantially inextensible after the tire is toroidally shaped, and being elongatable in corresponding relation to the blow-up ratio of the tire when the carcass and attached overlay and cylindrically shaped prior to toroidal expansion and application of said belt structure and said tread.

Claim 3

Dependent Claim 41 words

The tire of claim 1, wherein the cords of said carcass overlay each have a high modulus, low tensile strength core, and at least one inextensible yarn spirally wrapped around the core, when the overlay is laid in the unshaped tire.

Claim 4

Dependent Claim 25 words

The tire of claim 1, wherein the cords of the carcass overlay and nearest belt ply extend in the same general direction from said plane.

Claim 5

Dependent Claim 19 words

The tire of claim 2, wherein the core of said cords loses tensile strength when subjected to elevated temperatures.

Claim 6

Dependent Claim 36 words

The tire of claim 1, wherein the cords of said carcass overlay with the tire of the toroidal configuration are disposed at angles in the range of from 4 to 13 degrees relative to said plane.

Claim 7

Dependent Claim 20 words

The tire of claim 5, wherein the cords of said carcass overlay are disposed at angles of around 8 degrees.

Claim 8

Dependent Claim 27 words

The tire of claim 1, wherein marginal edges of the carcass overlay extend into the sidewalls and terminate short of the maximum flex zones of the sidewalls.

Claim 9

Dependent Claim 70 words

The tire of claim 1, which includes: (f) a cushion disposed between the belt structure and carcass overlay, the cushion being composed of a separate layer of elastomeric material having an elasticity which is at least 100 gr/mm 2 less than that of elastomeric material of which the cracass overlay and the belt ply adjacent said cushion are composed, the elasticity being defined at 100 percent elongation of said material.

Claim 10

Dependent Claim 30 words

The tire of claim 2, wherein the core is composed of cotton and the spiral wrapping is composed of material of the group of rayon, nylon, polyester, aramid and metal.

Claim 11

Dependent Claim 27 words

The tire of claim 1, wherein the cords of the carcass ply are composed of materials of the group of rayon, polyester, glass fibers, aramid, and steel.

Claim 12

Dependent Claim 26 words

The tire of claim 1, wherein the cords of said pair of belt plies are composed of materials of the group of metal, aramid and glass.

Claim 13

Dependent Claim 20 words

The tire of claim 11, wherein the cords of said pair of belt plies are composed of brass-coated steel wires.

Claim 14

Dependent Claim 39 words

The tire of claim 2, wherein the tire has a blow-up ratio in the range from 155-195 percent and the cords of said carcass overlay are elongatable of from 70-90 percent when the overlay is in a cylindrical configuration.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-04-20	1984-10-20	1985-04-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-04-20	1988-10-20	1989-04-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-04-20	1992-10-20	1993-04-21	$7700.00	Window Closed / Lapsed

Radial tire with a low angle carcass overlay ply

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