US4609024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic radial tire cord for belt
Assignee: Bridgestone Corp
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Filing: 1985-05-02
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Granted: 1986-09-02
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Expires: 2005-05-02
Abstract
Abstract A pneumatic radial tire comprising a radial carcass and a belt superimposed about a crown of the carcass is disclosed. In this tire, the cord for the belt is a metallic cord comprising a core of two metallic wires and an outer layer of six metallic wires disposed about the core, all of these wires having the same diameter and twisting direction and a form ratio of 90˜110%.
Inventors
- 👤 Joji Yatsunami
- 👤 Tamio Araki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:55
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; D07B2201/00; D07B2201/20; D07B2201/2001; D07B2201/2006; D07B2201/2015; D07B2201/2016; D07B2201/2018; D07B2201/2023; D07B2201/2024; D07B2201/2025; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
In a pneumatic radial tire comprising a carcass of a radial cord structure and a belt of cord structure superimposed about a crown of the carcass, the improvement wherein the cord for the belt is a metallic cord comprising a core of two metallic wires and an outer layer of six metallic wires disposed about the core, all of said metallic wires having the same diameter and twisting direction and a form ratio of 90˜110%.
Claim 2
Dependent Claim
75 words
In a pneumatic radial tire comprising a carcass of a radial cord structure and a belt of cord structure superimposed about a crown of the carcass, the improvement wherein the cord for the belt is a metallic cord comprising a core of two metallic wires and an outer layer of six metallic wires disposed about the core, all of said metallic wires having the same diameter and twisting direction and a form ratio of 90˜110%.
Claim 3
Dependent Claim
17 words
The pneumatic radial tire according to claim 1, wherein said metallic wire is a steel filament wire.
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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |