US3814162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire
Assignee: Toyo Tire Corp
•
Filing: 1972-10-30
•
Granted: 1974-06-04
•
Expires: 1992-10-30
Abstract
Abstract In a semi-radial ply tire having improved high speed durability, wear resistance and cornering properties while retaining good riding comfort, the carcass consists of at least two plies of nylon cords crossing at 70* - 80* with respect to the equatorial line of the tire, and the breaker consists of an inner layer of two plies of steel cords crossing at 15* - 25* with respect to said line and of an outer layer of two plies of textile cords crossing at 10* - 20* with respect to said line, provided that the layer of the steel cords shares 40 - 65 percent of the entire strength of the breaker layer.
Inventors
- 👤 T Hashida
- 👤 M Okumura
- 👤 H Fujishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2009; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10801; Y10T152/1081
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
In a pneumatic tire comprising; a tread, a pair of bead wires, a carcass layer fixed to the bead wires and a breaker layer located between the tread and carcass layer, the improvement wherein: said carcass layer consists of at least two plies of nylon cords which are disposed so as to cross mutually in opposite directions at an angle of inclination, with respect to the equatorial line of the tire, of from 70* to 80* and said breaker layer consists of two superposed groups: one group being an inner layer of two plies of steel cords embedded in a rubber compound and the other group being an outer layer of two plies of textile fiber cords embedded in a rubber compound, said one group having said plies of steel cords crossing each other in opposite directions at an angle of inclination, with respect to the said line, of from 15* to 25* and sharing 40 to 65 percent of the over-all strength of the breaker layer and said other group having said plies of textile fiber cords crossing each other in opposite directions at an angle of inclination, with respect to said line, of from 10* to 20*, and wherein the angle of inclination with respect to the equatorial line of the tire, of said steel cords is at least 5* larger than that of said textile fiber cords.
Claim 2
Dependent Claim
230 words
In a pneumatic tire comprising; a tread, a pair of bead wires, a carcass layer fixed to the bead wires and a breaker layer located between the tread and carcass layer, the improvement wherein: said carcass layer consists of at least two plies of nylon cords which are disposed so as to cross mutually in opposite directions at an angle of inclination, with respect to the equatorial line of the tire, of from 70* to 80* and said breaker layer consists of two superposed groups: one group being an inner layer of two plies of steel cords embedded in a rubber compound and the other group being an outer layer of two plies of textile fiber cords embedded in a rubber compound, said one group having said plies of steel cords crossing each other in opposite directions at an angle of inclination, with respect to the said line, of from 15* to 25* and sharing 40 to 65 percent of the over-all strength of the breaker layer and said other group having said plies of textile fiber cords crossing each other in opposite directions at an angle of inclination, with respect to said line, of from 10* to 20*, and wherein the angle of inclination with respect to the equatorial line of the tire, of said steel cords is at least 5* larger than that of said textile fiber cords.
Claim 3
Dependent Claim
230 words
In a pneumatic tire comprising: a tread, a pair of bead wires, a carcass layer located between the tread and carcass layer, the improvement wherein: said carcass layer consists of at least two plies of nylon cords which are disposed so as to cross mutually in opposite directions at an angle of inclination, with respect to the equatorial line of the tire, of from 70* to 80* and said breaker layer consists of two superposed groups: one group being an inner layer of two plies of steel cords embedded in a rubber compound and the other group being an outer layer of two plies of textile fiber cords embedded in a rubber compound, said one group having said plies of steel cords crossing each other in opposite directions at an angle of inclination, with respect to the said line, of from 15* to 25* and sharing 40 to 65 percent of the over-all strength of the breaker layer and said other group having said plies of textile fiber cords crossing each other in opposite directions at an angle of inclination, with respect to said line, of from 10* to 20*, and wherein said rubber compound for embedding the steel cords has a 100 percent modulus of 50 to 70 Kg/cm2 and said rubber compound for embedding the textile fiber cords has a 100 percent modulus of 30 to 50 Kg/cm2.
Claim 4
Dependent Claim
230 words
In a pneumatic tire comprising: a tread, a pair of bead wires, a carcass layer located between the tread and carcass layer, the improvement wherein: said carcass layer consists of at least two plies of nylon cords which are disposed so as to cross mutually in opposite directions at an angle of inclination, with respect to the equatorial line of the tire, of from 70* to 80* and said breaker layer consists of two superposed groups: one group being an inner layer of two plies of steel cords embedded in a rubber compound and the other group being an outer layer of two plies of textile fiber cords embedded in a rubber compound, said one group having said plies of steel cords crossing each other in opposite directions at an angle of inclination, with respect to the said line, of from 15* to 25* and sharing 40 to 65 percent of the over-all strength of the breaker layer and said other group having said plies of textile fiber cords crossing each other in opposite directions at an angle of inclination, with respect to said line, of from 10* to 20*, and wherein said rubber compound for embedding the steel cords has a 100 percent modulus of 50 to 70 Kg/cm2 and said rubber compound for embedding the textile fiber cords has a 100 percent modulus of 30 to 50 Kg/cm2.
Claim 5
Dependent Claim
17 words
The pneumatic tire as set forth in claim 1, wherein said textile fiber cords are of rayon.
Claim 6
Dependent Claim
25 words
The pneumatic tire as set forth in claim 1, wherein said textile fiber cords onE material of the group consisting of polyester and polyvinyl alcohol.
Claim 7
Dependent Claim
20 words
The pneumatic tire as set forth in claim 1, wherein said carcass layer consists of two plies of nylon cords.
Claim 8
Dependent Claim
54 words
The pneumatic tire as set forth in claim 1, wherein the respective plies of cords in said carcass layer and in said breaker layer are oriented at equal and opposite angles of inclination with respect to the equatorial line of the tire and thus, all the plies are in sequence, oriented in alternate directions.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |