US4096899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light weight pneumatic tire having a thin side wall rubber
Assignee: Bridgestone Corp
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Filing: 1976-09-03
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Granted: 1978-06-27
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Expires: 1996-09-03
Abstract
Abstract A light weight pneumatic tire having a thin side wall rubber is disclosed. The thin side wall rubber has previously been squeezed on that region of the outer surface of an upper ply which corresponds to the side wall portion of the tire prior to the tire shaping step and possessed of a Shore A hardness after vulcanization of 40° to 55°, an excellent flex-cracking and weather resistant property. The upper ply is superimposed about at least a portion extending from a hump portion to a bead portion of the tire and composed of cords coated with a high resilient rubber. A tread rubber layer is extended across the thin side wall rubber layers and pressed and made integral therewith by stretching.
Inventors
- 👤 Yoichi Kitazawa
- 👤 Takeshi Sato
- 👤 Hisao Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:59
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/0009; B60C15/0036; B60C15/0045; B60C13/00; B60C15/0018; B60C3/00; B60C3/06; B60C9/00; B60C9/02; B60C9/0207; B60C9/04; B60C9/06; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819; Y10T152/10828; Y10T152/10837; Y10T152/10855; Y10T152/10864
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
A light weight pneumatic tire having a thin sidewall rubber, comprising a bias laid carcass ply composed of cords angularly disposed with respect to the circumferential direction of the tire and extending from one of a pair of bead portions through a crown portion to another bead portion, a breaker layer superimposed about the crown portion of said carcass ply, an upper ply disposed on said carcass ply and extending from the bead portion to at least an edge of the crown portion and maintaining an overlapping relation with the breaker layer, said upper ply being composed of cords crossed to the cords of the carcass ply symmetrically with respect to the circumferential direction of the tire, and a thin rubber layer disposed on the outer surface of said upper ply and having a thickness of 0.5 to 3.0 mm and a Shore A hardness after vulcanization of 40° to 55°.
Claim 2
Dependent Claim
151 words
A light weight pneumatic tire having a thin sidewall rubber, comprising a bias laid carcass ply composed of cords angularly disposed with respect to the circumferential direction of the tire and extending from one of a pair of bead portions through a crown portion to another bead portion, a breaker layer superimposed about the crown portion of said carcass ply, an upper ply disposed on said carcass ply and extending from the bead portion to at least an edge of the crown portion and maintaining an overlapping relation with the breaker layer, said upper ply being composed of cords crossed to the cords of the carcass ply symmetrically with respect to the circumferential direction of the tire, and a thin rubber layer disposed on the outer surface of said upper ply and having a thickness of 0.5 to 3.0 mm and a Shore A hardness after vulcanization of 40° to 55°.
Claim 3
Dependent Claim
28 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein the thickness of said thin rubber layer is 0.5 to 2.0 mm.
Claim 4
Dependent Claim
48 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein said upper ply is composed of an outside turn-up portion of said main carcass ply, the upper end of said outside turn-up portion being terminated at the crown portion of the tire.
Claim 5
Dependent Claim
37 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein said upper ply extends from one of the bead portions through the crown portion of the carcass to another bead portion.
Claim 6
Dependent Claim
33 words
A light weight pneumatic tire having a thin side wall rubber according to claim 4, wherein said upper ply in the crown portion is interposed between the carcass ply and the breaker ply.
Claim 7
Dependent Claim
29 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein both said carcass ply and said upper ply are composed of polyester cords.
Claim 8
Dependent Claim
24 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1 and further comprising a flipper composed of nylon cords.
Claim 9
Dependent Claim
68 words
A light weight pneumatic tire having a thin side wall rubber according to claim 7, wherein a height Z of the upper end of an inside turn-up portion of said flipper from a bead core is higher than a height Z' of the upper end of an outside turn-up portion of said flipper from the bead core, said difference between Z and Z' being 0.5 to 2.5 cm.
Claim 10
Dependent Claim
74 words
A light weight pneumatic tire having a thin side wall rubber according to claim 8, wherein said height Z, Z' of the upper ends of the turn-up portions of said flipper 8 are 1/2 to 1/5 times shorter than a height H of the inner surface of the tire in its inflated state measured from a reference line connecting the heel and heel of the bead portion of the tire united with the rim.
Claim 11
Dependent Claim
50 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein the upper end of an outside turn-up portion of said main carcass ply is located at a position which is higher than the upper end of a flange of a rim of the tire.
Claim 12
Dependent Claim
53 words
A light weight pneumatic tire having a thin side wall rubber according to claim 1, wherein said upper ply is wound about the toe of the bead portion from the outside toward the inside thereof to form a turn-up portion which is balanced with the outside turn-up portion of said main carcass ply.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |