US3910335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire having carcass cords describing S-shaped and Z-shaped paths
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1973-08-30
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Granted: 1975-10-07
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Expires: 1993-08-30
Abstract
Abstract The carcass reinforcement of a pneumatic tire extends continuously from one bead wire to the other. The cords of the reinforcement have a substantially longitudinal orientation under the tread portion, an oblique orientation between the midpoint of each sidewall and the corresponding bead wire, and, between the midpoint of each sidewall and the corresponding shoulder, an Sshaped path tangent at two circumferentially and radially separated points to radial planes of the tire.
Inventors
- 👤 Jacques Boileau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:23
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/07; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/22; B60C9/0042
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
In a ply of carcass cords to be used in manufacturing a tire which comprises a tread and a pair of sidewalls at opposite edges of the tread and extending radially inwardly therefrom, the improvement in which said carcass cords are inclined with respect to the longitudinal direction of the tire, the cords in a central portion adjacent to the location at which said tread is to be applied and in two side portions beyond the location at which said tread is to be applied and in locations intended to be included in said sidewalls, respectively, being permanently inclined in one direction and in two intermediate portions beyond the location at which said tread is to be applied and in locations intended to be included in said sidewalls, respectively, being permanently inclined in the other direction with respect to said longitudinal direction.
Claim 2
Dependent Claim
142 words
In a ply of carcass cords to be used in manufacturing a tire which comprises a tread and a pair of sidewalls at opposite edges of the tread and extending radially inwardly therefrom, the improvement in which said carcass cords are inclined with respect to the longitudinal direction of the tire, the cords in a central portion adjacent to the location at which said tread is to be applied and in two side portions beyond the location at which said tread is to be applied and in locations intended to be included in said sidewalls, respectively, being permanently inclined in one direction and in two intermediate portions beyond the location at which said tread is to be applied and in locations intended to be included in said sidewalls, respectively, being permanently inclined in the other direction with respect to said longitudinal direction.
Claim 3
Dependent Claim
34 words
A ply according to claim 1 wherein the inclination of said cords in the intermediate portions is within 15* of being symmetrical with respect to the inclination of said cords in the other portions.
Claim 4
Dependent Claim
46 words
A ply according to claim 2 wherein the center-to-center spacing e of the cords, the diameter d of the cords, the inclination Alpha o of the cords with respect to the longitudinal direction of the tire, and the conformation ratio t, are related by the equation:
Claim 5
Independent Claim
117 words
A method of making tires comprising the steps of assembling on a cylindrical tire-making drum a pair of bead wires and a carcass reinforcement comprising superimposed plies of cords which are continuous from one bead wire to the other, orienting the cords of each of said plies on said cylindrical drum in a first direction over a major part of their length and in a second direction in two intermediate portions, said first and second directions being respectively inclined in opposite senses with respect to the longitudinal direction of the tire, placing a tread on said tire, shaping said tire while maintaining inclinations in opposite senses of said carcass cords as specified above, and vulcanizing said tire.
Claim 6
Independent Claim
117 words
A method of making tires comprising the steps of assembling on a cylindrical tire-making drum a pair of bead wires and a carcass reinforcement comprising superimposed plies of cords which are continuous from one bead wire to the other, orienting the cords of each of said plies on said cylindrical drum in a first direction over a major part of their length and in a second direction in two intermediate portions, said first and second directions being respectively inclined in opposite senses with respect to the longitudinal direction of the tire, placing a tread on said tire, shaping said tire while maintaining inclinations in opposite senses of said carcass cords as specified above, and vulcanizing said tire.
Claim 7
Dependent Claim
90 words
A method according to claim 4 further comprising the step of placing on said carcass reinforcement, before the placing of said tread on said tire and before said shaping and vulcanization, first at least one layer of soft rubber and then at least two tread plies of cords, said tread plies having a width substantially equal to the width of said tread and being calendered in rubber, said layer of soft rubber having a modulus of elasticity at 100% elongation less than that of the rubber calendering said tread plies.
Claim 8
Dependent Claim
39 words
A method according to claim 5 comprising the step of arranging the cords of said carcass reinforcement and the cords of said tread plies so that they form angles with respect to each other of not more than 20*.
Claim 9
Dependent Claim
34 words
A ply according to claim 1 in which, in each of said portions, the absolute value of the angles of said cords with respect to the longitudinal direction is substantially 51* + or -15*.
Claim 10
Dependent Claim
37 words
A ply according to claim 1 in which, in each of said portions, the absolute value of the angles of said cords with respect to the longitudinal direction is substantially within the range of 60* to 75*.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |