Patent US3874436A successfully refreshed from Google Patents.
US3874436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial-ply tire with steel and textile breaker
Assignee: Toyo Tire Corp
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Filing: 1972-07-24
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Granted: 1975-04-01
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Expires: 1992-07-24
Abstract
Abstract A radial-ply tire having high speed durability improved cornering properties and abrasion resistance and retaining good riding comfort, wherein the breaker layer consists of inner layers of steel cords angled with respect to the equatorial line of the tire and outer layers of textile cords angled with respect to the equatorial line of the tire.
Inventors
- 👤 Taizo Hashida
- 👤 Shoji Miyoshi
- 👤 Hiroyasu Fujishima
- 👤 Masaru Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:01
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/26; B60C9/20; B60C9/2003; B60C9/2009; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10792; Y10T152/10801; Y10T152/1081
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
195 words
A RADIAL-PLY TIRE COMPRISING A CARCASS, A TREAD AND A BREAKER LAYER, SAID BREAKER LAYER CONSISTING OF FOUR RUBBERIZED CORD LAYERS COMPRISING TWO SEPARATE OUTSIDE CORD LAYERS COMPOSED OF TEXTILE FIBER CORDS AND TWO INSIDE CORD LAYERS COMPOSED OF STEEL CORES, THE SAME KINDS OF CORDS CROSSING EACH OTHER, SAID TEXTILE FIBER CORDS HAVING AN ANGLE OF INCLINATION OF 10* TO 20* WITH RESPECT TO THE EQUATORIAL LINE OF SAID TIRE AND SAID STEEL CORDS HAVING AN ANGLE OF INCLINATION OF 15* TO 25* WITH RESPECT TO SAID EQUATORIAL LINE, SAID STEEL CORDS SHARING 40 TO 65 PERCENT OF THE ENTIRE STRENGTH OF SAID BREAKER LAYER, THE ANGLE OF INCLINATION OF SAID STEEL CORES WITH RESPECT TO SAID EQUATORIAL LINE BEING AT LEAST 5* LARGER THAN THE ANGLE OF INCLINATION OF SAID TEXTILE FIBER CORDS WITH RESPECT TO SAID EQUATORIAL LINE, WHEREIN THE RUBBER FOR EMBEDDING SAID TEXTILE FIBER CORDS HAS A 100 PERCENT MODULUS OF 40 TO 50 KG/CM2 AND THE RUBBER FOR EMBEDDING SAID STEEL CORDS HAS A 100 PERCENT MODULUS DIFFERENT FROM THE 100 PERCENT MODULUS OF SAID RUBBER FOR EMBEDDING SAID TEXTILE FIBER CORDS AND IS OF 50 TO 70 KG/CM2.
Claim 2
Dependent Claim
195 words
A RADIAL-PLY TIRE COMPRISING A CARCASS, A TREAD AND A BREAKER LAYER, SAID BREAKER LAYER CONSISTING OF FOUR RUBBERIZED CORD LAYERS COMPRISING TWO SEPARATE OUTSIDE CORD LAYERS COMPOSED OF TEXTILE FIBER CORDS AND TWO INSIDE CORD LAYERS COMPOSED OF STEEL CORES, THE SAME KINDS OF CORDS CROSSING EACH OTHER, SAID TEXTILE FIBER CORDS HAVING AN ANGLE OF INCLINATION OF 10* TO 20* WITH RESPECT TO THE EQUATORIAL LINE OF SAID TIRE AND SAID STEEL CORDS HAVING AN ANGLE OF INCLINATION OF 15* TO 25* WITH RESPECT TO SAID EQUATORIAL LINE, SAID STEEL CORDS SHARING 40 TO 65 PERCENT OF THE ENTIRE STRENGTH OF SAID BREAKER LAYER, THE ANGLE OF INCLINATION OF SAID STEEL CORES WITH RESPECT TO SAID EQUATORIAL LINE BEING AT LEAST 5* LARGER THAN THE ANGLE OF INCLINATION OF SAID TEXTILE FIBER CORDS WITH RESPECT TO SAID EQUATORIAL LINE, WHEREIN THE RUBBER FOR EMBEDDING SAID TEXTILE FIBER CORDS HAS A 100 PERCENT MODULUS OF 40 TO 50 KG/CM2 AND THE RUBBER FOR EMBEDDING SAID STEEL CORDS HAS A 100 PERCENT MODULUS DIFFERENT FROM THE 100 PERCENT MODULUS OF SAID RUBBER FOR EMBEDDING SAID TEXTILE FIBER CORDS AND IS OF 50 TO 70 KG/CM2.
Claim 3
Dependent Claim
150 words
A radial-ply tire comprising a carcass, a tread and a breaker layer, said breaker layer consisting of rubberized cord layers comprising two inside cord layers composed of steel cords and at least one outside cord layer of polyvinyl alcohol fiber cords, the same kinds of cords crossing each other, said polyvinyl alcohol fiber cords having an angle of inclination of 10* to 20* with respect to the equatorial line of said tire and said steel cords having an angle of inclination of 15* to 30* with respect to said equatorial line, providing that when more than one polyvinyl alcohol fiber cord layer is present said fiber layers are separate layers, and the plies of said carcass being polyester fiber cords, the angle of inclination of said steel cords with respect to said equatorial line being at least 5* larger than the angle of inclination of said polyvinyl alcohol fiber cords.
Claim 4
Dependent Claim
150 words
A radial-ply tire comprising a carcass, a tread and a breaker layer, said breaker layer consisting of rubberized cord layers comprising two inside cord layers composed of steel cords and at least one outside cord layer of polyvinyl alcohol fiber cords, the same kinds of cords crossing each other, said polyvinyl alcohol fiber cords having an angle of inclination of 10* to 20* with respect to the equatorial line of said tire and said steel cords having an angle of inclination of 15* to 30* with respect to said equatorial line, providing that when more than one polyvinyl alcohol fiber cord layer is present said fiber layers are separate layers, and the plies of said carcass being polyester fiber cords, the angle of inclination of said steel cords with respect to said equatorial line being at least 5* larger than the angle of inclination of said polyvinyl alcohol fiber cords.
Claim 5
Dependent Claim
44 words
The radial-ply tire of claim 2, wherein the rubber for embedding said polyvinyl alcohol fiber cords has a 100 percent modulus of 40 to 50 Kg/cm2 and the rubber for embedding said steel cords has a 100 percent modulus of 50 to 70 Kg/cm2.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |