Patent US4371025A successfully refreshed from Google Patents.
US4371025A
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US
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Reinforcing annular structure of radial tires
Assignee: PREUMATICI PIRELLI SpA Soc
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Filing: 1981-06-09
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Granted: 1983-02-01
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Expires: 2001-06-09
Abstract
Abstract A radial tire is provided with an annular reinforcing structure comprising at least two layers of steel monofilaments arranged on a carcass having a radius of curvature, on the meridian plane in the crown point, equal to or greater than 400 mm.
Inventors
- 👤 Cesare Canevari
- 👤 Aldo Signorini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:44
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2006; B60C9/0064; B60C9/2009; B60C2009/2074; B60C2009/2077; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A vehicle tire comprising a radial carcass having a crown point on a meridian plane, a tread, an annular reinforcing structure between the carcass and tread, said annular reinforcing structure comprising at least two reinforcing layers of metal monofilaments, each monofilament being embedded in said reinforcing layers as a single individual, metallic element spaced from the adjacent filaments, said monofilaments of each layer being parallel to one another and inclined at an angle between 10° and 30° with respect to the direction of the equatorial plane of the tire, the monofilaments of one layer crossing those of the adjacent layer, said carcass having a radius of curvature on the meridian plane in its crown point of at least 400 mm.
Claim 2
Dependent Claim
120 words
A vehicle tire comprising a radial carcass having a crown point on a meridian plane, a tread, an annular reinforcing structure between the carcass and tread, said annular reinforcing structure comprising at least two reinforcing layers of metal monofilaments, each monofilament being embedded in said reinforcing layers as a single individual, metallic element spaced from the adjacent filaments, said monofilaments of each layer being parallel to one another and inclined at an angle between 10° and 30° with respect to the direction of the equatorial plane of the tire, the monofilaments of one layer crossing those of the adjacent layer, said carcass having a radius of curvature on the meridian plane in its crown point of at least 400 mm.
Claim 3
Dependent Claim
24 words
A pneumatic tire as in claim 1, characterized by the fact that said monofilaments have a diameter between about 0.08 and about 0.5 mm.
Claim 4
Dependent Claim
19 words
The tire of claim 1 wherein the said annular breaker structure comprises a layer of heat shrinkable textile cords.
Claim 5
Dependent Claim
15 words
The tire of claim 1, 2, or 3 wherein the said metallic cords are steel.
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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |