Patent US2261680A successfully refreshed from Google Patents.
Patent US3709276A successfully refreshed from Google Patents.
US3709276A
Expired / Lapsed
US
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Bead area carcass cord arrangement for radial tires
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1970-12-18
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Granted: 1973-01-09
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Expires: 1990-12-18
Abstract
Abstract A radial pneumatic tire comprises one or more carcass plies the cords of which are folded back around steel bead wires and terminate at some distance from the bead wires. At least in the case of the ply the ends of which are farthest from the bead wires, the cords in each folded-back portion are curved so that their length is substantially greater than the minimum distance between the ends of the cords and the closest bead wire. This extends the life of the tire by preventing separation of the cords from the tire elastomer.
Inventors
- 👤 J Montague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/06; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819; Y10T152/10828
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A radial pneumatic tire comprising a pair of beads, a pair of bead wires respectively reinforcing said beads, a pair of sidewalls respectively joined to said beads, a tread extending between said sidewalls, and at least one carcass ply, said carcass ply being formed of cords and including a portion proper to each bead folded back around the respective bead wires, the cords in each folded-back portion being curved so that their length is substantially greater than the minimum distance between the ends of the cords and the closest bead wire, and each foldedback portion in each bead following a common path with the other folded-back portions in the same bead, which comes first closer to the carcass body then away from it with all ply ends distributed along such path.
Claim 2
Dependent Claim
131 words
A radial pneumatic tire comprising a pair of beads, a pair of bead wires respectively reinforcing said beads, a pair of sidewalls respectively joined to said beads, a tread extending between said sidewalls, and at least one carcass ply, said carcass ply being formed of cords and including a portion proper to each bead folded back around the respective bead wires, the cords in each folded-back portion being curved so that their length is substantially greater than the minimum distance between the ends of the cords and the closest bead wire, and each foldedback portion in each bead following a common path with the other folded-back portions in the same bead, which comes first closer to the carcass body then away from it with all ply ends distributed along such path.
Claim 3
Dependent Claim
47 words
A tire according to claim 1 wherein the cords in each folded-back portion are curved in such a manner that the regions thereof that most closely approach the inner surface of the tire are substantially midway between the ends of the cords and the respective bead wires.
Claim 4
Dependent Claim
25 words
A tire according to claim 2 wherein said regions are within said respective beads and the ends of the cords are in said respective sidewalls.
Claim 5
Dependent Claim
42 words
A tire according to claim 1 wherein the distance measured axially of said tire between the ends of said folded-back portions and said carcass ply excluding said folded-back portions is at least as great as the greatest diameter of said bead wires.
Claim 6
Dependent Claim
80 words
A tire according to claim 1 further comprising at least one additional carcass ply, said additional carcass ply being formed of cords and including a portion proper to each bead folded back around the respective bead wires on the outside of said one carcass ply, the cords in each folded-back portion of said additional carcass ply terminating at points that are closer to the respective bead wires than are the points at which the cords in said one ply terminate.
Claim 7
Dependent Claim
88 words
A tire according to claim 1 intended to be fitted to a rim having two lateral edges and wherein the end of the folded-back portion is at a radial distance from the base of the bead greater than the height of the portion of the bead intended to rest against an edge of said rim, while the point of the folded-back portion closest to the inner surface of the side-wall of the tire is at a radial distance from the base of the bead less than said height.
References Cited (Backward Citations)
US3245455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |