US4244414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial tires for heavy duty vehicles
Assignee: Toyo Tire Corp
•
Filing: 1978-12-19
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Granted: 1981-01-13
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Expires: 1998-12-19
Abstract
Abstract A radial tire for heavy duty use in vehicles. The tire has a carcass having a two-ply structure using polyester cords of more than 4500d as the ply cords. The spacing of the cords between the first and second plies at approximately the maximum tire width, is nearly 1.2-1.7 times as large as cord diameter. The edge portions of the ply cords turned up around bead cores are coated with the same rubber as ply coating rubber, an extension of the edge covering rubber from the edge of the ply cords is three times or more as large as cord diameter.
Inventors
- 👤 Yukihisa Uemura
- 👤 Shoji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:57
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/0009; B60C15/0072; B60C9/00; B60C9/02; B60C9/04; B60C9/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A heavy duty radial tire for use on large equipment such as trucks and buses, said radial tire comprising: a carcass structure having two plies which are made of polyester cords having a fineness of no less than 4500 deniers, and a ply-to-ply cord spacing from the first ply to the second ply of between 1.2 to 1.7 times the cord diameter at the maximum tire width, said carcass ply cords being coated with rubber and said tire having bead cores with the end portions of said carcass ply cords being turned up around said bead cords and being covered with said rubber coating of said carcass ply cords, said rubber coating on said carcass ply cords extending beyond the ends of said cords at least three times the diameter of said carcass ply cords.
Claim 2
Dependent Claim
135 words
A heavy duty radial tire for use on large equipment such as trucks and buses, said radial tire comprising: a carcass structure having two plies which are made of polyester cords having a fineness of no less than 4500 deniers, and a ply-to-ply cord spacing from the first ply to the second ply of between 1.2 to 1.7 times the cord diameter at the maximum tire width, said carcass ply cords being coated with rubber and said tire having bead cores with the end portions of said carcass ply cords being turned up around said bead cords and being covered with said rubber coating of said carcass ply cords, said rubber coating on said carcass ply cords extending beyond the ends of said cords at least three times the diameter of said carcass ply cords.
Claim 3
Dependent Claim
29 words
A heavy duty radial tire as claimed in claim 1, wherein said tire further comprises at least one steel belt circumferentially located within said tire around said two plies.
References Cited (Backward Citations)
US3090417A
Cited
US3245454A
Cited
US3690362A
Cited
US3964533A
Cited
US4046183A
Cited
US4019551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |