US3861440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-radial tire having breakers disposed between adjacent carcass plies
Assignee: Bridgestone Corp
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Filing: 1974-01-02
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Granted: 1975-01-21
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Expires: 1994-01-02
Abstract
Abstract A semi-radial pneumatic tire having at least two carcass plies and at least two breaker strips. Each of the carcass plies includes parallel cords whose angle relative to the equatorial direction of the tire at tire sidewalls being 65* to 82*, while each of the breaker strips includes parallel cords disposed at an angle of 17* to 30* relative to the equatorial direction of the tire, the carcass cord angle in the tire crown portion relative to the tire equator being between that of the carcass cord at the sidewall and that of the breaker cord. All the breakers are disposed between adjacent carcass plies, and the width of each breaker in the direction of the axis of rotation of the tire is between 55 to 85 percent of the maximum tire width in the same axial direction.
Inventors
- 👤 Koichiro Ochiai
- 👤 Makoto Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:08
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/0009; B60C15/0072; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/22; B60C9/00; B60C9/02; B60C9/0207; B60C9/04; B60C9/06; B60C9/18; B60C9/28; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/1081
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
A semi-radial tire having cord reinforcements, said cord reinforcements consisting of two rubber coated carcass plies extending between beads, each of said carcass plies consisting of parallel cords, the carcass cords in tire sidewall portions being disposed at an angle of 65* to 82* relative to the equatorial direction of the tire, the cords of the two carcass plies crossing with each other; a breaker means disposed between adjacent carcass plies at a crown portion of the tire, said breaker means consisting of at least two breaker plies each having parallel cords disposed at an angle of 17* to 30* relative to the equatorial direction of the tire, the cords of the paired breaker plies crossing with each other, the angle of the carcass cords at midcircumferential plane relative to said equatorial direction being intermediate between said breaker cord angle and said carcass cord angle at the tire sidewall portion; the width of said breaker means in the direction of the axis of rotation of the tire under inflated condition being 55 to 85 percent of the maximum width of the tire in the same direction; and a rubber layer means covering the outer surface of the tire.
Claim 2
Dependent Claim
198 words
A semi-radial tire having cord reinforcements, said cord reinforcements consisting of two rubber coated carcass plies extending between beads, each of said carcass plies consisting of parallel cords, the carcass cords in tire sidewall portions being disposed at an angle of 65* to 82* relative to the equatorial direction of the tire, the cords of the two carcass plies crossing with each other; a breaker means disposed between adjacent carcass plies at a crown portion of the tire, said breaker means consisting of at least two breaker plies each having parallel cords disposed at an angle of 17* to 30* relative to the equatorial direction of the tire, the cords of the paired breaker plies crossing with each other, the angle of the carcass cords at midcircumferential plane relative to said equatorial direction being intermediate between said breaker cord angle and said carcass cord angle at the tire sidewall portion; the width of said breaker means in the direction of the axis of rotation of the tire under inflated condition being 55 to 85 percent of the maximum width of the tire in the same direction; and a rubber layer means covering the outer surface of the tire.
Claim 3
Dependent Claim
45 words
A semi-radial tire according to claim 1 and further comprising a pair of reinforcing layers disposed between opposite edges of said breaker means and an innermost carcass ply, respectively, said reinforcing layers having a Young''s modulus which is larger than that of carcass coating rubber.
Claim 4
Dependent Claim
28 words
A semi-radial tire according to claim 2, wherein said reinforcing layers having parallel cords made of organic fibers and disposed at an acute angle with the carcass cords.
Claim 5
Dependent Claim
21 words
A semi-radial tire according to claim 1, wherein the cords of the adjacent carcass and breaker plies cross with each other.
Claim 6
Dependent Claim
14 words
A semi-radial tire according to claim 1, wherein said breaker cords are steel cords.
Claim 7
Dependent Claim
25 words
A semi-radial tire according to claim 1, wherein said carcass cords are made of a material selected from the group consisting of nylon and polyester.
Claim 8
Dependent Claim
29 words
A semi-radial tire according to claim 2, wherein said reinforcing layers having a Young''s modulus which is greater than but substantially similar to that of the carcass coating rubber.
Claim 9
Dependent Claim
26 words
A semi-radial tire according to claim 1, wherein the carcass cord angle at the midcircumferential plane is 68* and the breaker cord angle there is 20*.
References Cited (Backward Citations)
US3195604A
Cited
US3516465A
Cited
US3422873A
Cited
US3598165A
Cited
US3612136A
Cited
US3620279A
Cited
US3685564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |