US4257469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial tire having inner and outer carcass layers, cords of outer layer are thinner relative to inner and cover bead filler
Assignee: Toyo Tire Corp
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Filing: 1978-08-17
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Granted: 1981-03-24
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Expires: 1998-08-17
Abstract
Abstract A radial tire for heavy duty vehicles with a plurality of carcass ply layers made of textile cords having end portions of such layers turning round a bead core and having turnup along a bead filler is disclosed. The tire of this invention has its inner layers comprising thick cords, while outer layers comprises thin cords long enough to entirely cover the bead filler, whereby the bead filler is fully in contact with the outer layer made of thin cords.
Inventors
- 👤 Yukihisa Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:37
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/08; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10855; Y10T152/10873
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A radial tire for heavy duty vehicles with a plurality of carcass ply layers comprising inner and outer ply layers made of textile cords whose end portion turn around a bead core and return along a bead filler, wherein: one or more inner layers comprise cords, one or more outer ply layers comprise cords thinner than said cords of said inner ply layers, and at least an outermost ply layer of said outer ply layers has such turnup as to be long enough to cover said bead filler.
Claim 2
Dependent Claim
88 words
A radial tire for heavy duty vehicles with a plurality of carcass ply layers comprising inner and outer ply layers made of textile cords whose end portion turn around a bead core and return along a bead filler, wherein: one or more inner layers comprise cords, one or more outer ply layers comprise cords thinner than said cords of said inner ply layers, and at least an outermost ply layer of said outer ply layers has such turnup as to be long enough to cover said bead filler.
Claim 3
Dependent Claim
22 words
A radial tire according to claim 1, wherein at least said outermost layer only comprises cords thinner than said inner ply layer.
Claim 4
Dependent Claim
22 words
A radial tire according to claim 2, wherein the turnup of the outermost layer is longer than those of the other layers.
Claim 5
Dependent Claim
39 words
A heavy loading radial tire according to claims 2 or 3, wherein said tire has three-ply layers and the two inner layers comprise polyester tire cords 1500 d/2/2 and the outer layer comprises of polyester tire cords 1500 d/2.
Claim 6
Dependent Claim
38 words
A heavy loading radial tire according to claims 2 or 3, wherein the tire has three-ply layers, and the inner two layers comprise polyester tire cords 1500 d/2/2 and the outer layer comprises nylon tire cords 840 d/2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |