US3881538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tires and breakers therefor
Assignee: Uniroyal SA
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Filing: 1973-06-06
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Granted: 1975-05-06
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Expires: 1993-06-06
Abstract
Abstract A multi-ply reinforcing breaker for a radial ply tire, the breaker comprising a plurality of plies superposed upon one another which decreases successively in span axially of the tire from the radially innermost ply to the radially outermost ply. The innermost ply is folded at its ends to in part overlap at least one of the others and, thereby, resist edge separation of the plies from one another.
Inventors
- 👤 Henri J Mirtain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/26; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10792
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A pneumatic tire comprising a radial ply carcass having a crown region, a tread overlying said crown region, and a breaker assembly interposed between said tread and carcass, the breaker assembly comprising a first ply, a second ply overlying said first ply, and a third ply overlying said second ply, said first ply having a greater axial span than said second ply and terminating in a pair of folded marginal edge portions overlying at least in part said second ply, said third ply having a lesser axial span than said second ply and terminating in a pair of oppositely directed edges which are proximate and substantially coplanar with at least a substantial extent of each of said folded marginal edge portions of said first ply, each of said folded marginal edge portions of said first ply including a bent transition zone which divides said edge portions each into a pair of integral sections, one section of each of said edge portions overlying said second ply and being coplanar with said third ply, the other section of each of said edge portions overlying said third ply.
Claim 2
Dependent Claim
185 words
A pneumatic tire comprising a radial ply carcass having a crown region, a tread overlying said crown region, and a breaker assembly interposed between said tread and carcass, the breaker assembly comprising a first ply, a second ply overlying said first ply, and a third ply overlying said second ply, said first ply having a greater axial span than said second ply and terminating in a pair of folded marginal edge portions overlying at least in part said second ply, said third ply having a lesser axial span than said second ply and terminating in a pair of oppositely directed edges which are proximate and substantially coplanar with at least a substantial extent of each of said folded marginal edge portions of said first ply, each of said folded marginal edge portions of said first ply including a bent transition zone which divides said edge portions each into a pair of integral sections, one section of each of said edge portions overlying said second ply and being coplanar with said third ply, the other section of each of said edge portions overlying said third ply.
Claim 3
Dependent Claim
21 words
A tire as claimed in claim 1, wherein at least said second ply includes a pair of oppositely directed hemmed edges.
Claim 4
Dependent Claim
18 words
A tire as claimed in claim 2, wherein said oppositely directed edges of said third ply are hemmed.
Claim 5
Dependent Claim
30 words
A tire as claimed in claim 1, wherein each of said sections of each of said folded marginal edge portions has an axial extent within the range of 15-30 mm.
Claim 6
Dependent Claim
34 words
A tire as claimed in claim 1, wherein said first ply includes reinforcing cords therein, said second and third plies including reinforcing cords therein of lesser pliability than the cords in said first ply.
Claim 7
Dependent Claim
27 words
A tire as claimed in claim 5, wherein the cords in said first ply are non-metallic and the cords in said second and third plies are metallic.
Claim 8
Dependent Claim
58 words
A tire as claimed in claim 5, wherein the cords in said first ply include seven strands of three filmanets, said strands being surrounded by a single spiral-wound filament, the cords in said second and third plies each including a single strand of three filaments, the latter said strand being surrounded by an aarray of six spiral-wound fialments.
Claim 9
Dependent Claim
64 words
A tire as claimed in claim 1, wherein said first, second and third plies each includes a plurality of cords therein, the cords in said first and second plies being commonly inclined in one general axial direction relative to a median equatorial plane of the tire, the cords in said third ply being inclined in a generally opposite axial direction relative to said plane.
Claim 10
Dependent Claim
64 words
A tire as claimed in claim 1, wherein said first, second and third plies each includes a plurality of cords therein, the cords in said first and third plies being commonly inclined in one general axial direction relative to a median equatorial plane of the tire, the cords in said second ply being inclined in a generally opposite axial direction relative to said plane.
References Cited (Backward Citations)
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US3516468A
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |