US5351735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire with belt ply including both steel cords and aromatic polyamide cords
Assignee: Sumitomo Rubber Industries Ltd
•
Filing: 1993-04-16
•
Granted: 1994-10-04
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Expires: 2013-04-16
Abstract
Abstract A pneumatic tire comprises a carcass extending between the bead portion and turned up around bead cores, and a belt disposed radially outside the carcass and inside the tread and comprising at least one ply of cords including steel cords and aromatic polyamide cords.
Inventors
- 👤 Takaaki Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2009
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A pneumatic tire comprising a carcass extending between the bead portion and turned up around bead cores, and a belt disposed radially outside the carcass and inside a tread, said belt comprising at least one ply of parallel cords including steel cords and aromatic polyamide cords arranged in a plurality of sequences in the widthwise direction of said belt and the ratio of the steel cord count to the aromatic polyamide cord count in each of said sequences in each said ply being varied in the widthwise direction of said belt.
Claim 2
Dependent Claim
91 words
A pneumatic tire comprising a carcass extending between the bead portion and turned up around bead cores, and a belt disposed radially outside the carcass and inside a tread, said belt comprising at least one ply of parallel cords including steel cords and aromatic polyamide cords arranged in a plurality of sequences in the widthwise direction of said belt and the ratio of the steel cord count to the aromatic polyamide cord count in each of said sequences in each said ply being varied in the widthwise direction of said belt.
Claim 3
Dependent Claim
18 words
The tire according to claim 1, wherein said ratio increases from the tire equator toward both sides thereof.
Claim 4
Dependent Claim
23 words
The tire according to claim 1, wherein said belt comprises a plurality of plies of the steel cords and the aromatic polyamide cords.
Claim 5
Dependent Claim
39 words
The tire according to claim 1, wherein said belt comprises a plurality of plies of the steel cords and the aromatic polyamide cords, and the ratio of each said ply increases from the tire equator toward both sides thereof.
Claim 6
Dependent Claim
25 words
The tire according to any of claims 1, 2, 3 or 4 wherein said belt further comprises at least one single material cord belt ply.
Claim 7
Dependent Claim
38 words
A pneumatic tire according to claim 1 wherein each of said sequences includes a first grouping of at least one of said steel cords adjacent to a second grouping of at least one of said aromatic polyamide cords.
References Cited (Backward Citations)
US3850219A
Cited
US4073330A
Cited
GB2063185A
Cited
JPS56112304A
Cited
US4890658A
Cited
JPS6483406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |