US3799233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire for vehicle wheels
Assignee: Industrie Pirelli SpA
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Filing: 1972-09-11
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Granted: 1974-03-26
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Expires: 1992-09-11
Abstract
Abstract A pneumatic tire for vehicle wheels composed of a carcass, a breaker structure formed from two superimposed layers of cord fabric made from textiles, metals or glass, and at least one annular element on each shoulder constituted of a rubber compound in which is embedded particles of a material having a modulus of elasticity of at least 5,000 Kg/mm2. The particles are oriented with the axis of orientation forming an angle smaller than 10* with tangents to the parallels of the tire. The annular elements are in contact with the lateral edges of the layers of the breaker structure by being positioned between the layers and the carcass, by being composed of two strips one of which is positioned between the layers and one of which is positioned between the layers and the carcass or being composed of two strips of which each is formed into a U-shape and envelops one lateral edge of each breaker layer.
Inventors
- 👤 G Cappa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:07
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/0028; B60C9/18; B60C9/1821; B60C9/20; B60C9/26; B60C9/1835; B60C2009/1864; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10513; Y10T152/10765; Y10T152/1081
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A pneumatic tire for vehicle wheels comprising a carcass and a breaker structure formed by at least two superimposed layers of cords embedded in a rubber compound, wherein each shoulder of the tire contains at least one annular element constituted of a rubber compound having embedded therein particles of a material having a modulus of elasticity of at least 5,000 kg/mm2, said particles having a diameter and length respectively ranging between 2 and 20 microns and between 0.1 and 1 mm, the amount by weight of said particles in the compound ranging between 1 percent and 30 percent with respect to the total weight of the compound, said particles being substantially oriented inside the compound with at least 90 percent of them having their axis forming an angle smaller than 10* with the tangents to the parallels of the tire.
Claim 2
Dependent Claim
140 words
A pneumatic tire for vehicle wheels comprising a carcass and a breaker structure formed by at least two superimposed layers of cords embedded in a rubber compound, wherein each shoulder of the tire contains at least one annular element constituted of a rubber compound having embedded therein particles of a material having a modulus of elasticity of at least 5,000 kg/mm2, said particles having a diameter and length respectively ranging between 2 and 20 microns and between 0.1 and 1 mm, the amount by weight of said particles in the compound ranging between 1 percent and 30 percent with respect to the total weight of the compound, said particles being substantially oriented inside the compound with at least 90 percent of them having their axis forming an angle smaller than 10* with the tangents to the parallels of the tire.
Claim 3
Dependent Claim
14 words
The pneumatic tire of claim 1, wherein the oriented particles are made of glass.
Claim 4
Dependent Claim
26 words
The pneumatic tire of claim 1, wherein each of said annular elements is partially positioned between said layers of the breaker structure and the tire carcass.
Claim 5
Dependent Claim
38 words
The pneumatic tire of claim 1, wherein each of said annular elements is folded in a substantially U-shape, each lateral edge of the breaker being inserted between the two arms of the U of the corresponding annular element.
Claim 6
Dependent Claim
52 words
The pneumatic tire of claim 1, wherein each of said annular elements comprises at least one pair of continuous strips, one of the strips of said pair being partially positioned between the two layers of the breaker structure, while the other is arranged between one of said layers and the tire carcass.
Claim 7
Dependent Claim
62 words
The pneumatic tire of claim 1, wherein each of said annular elements comprises at least one pair of continuous strips, each strip of said pair of strips being folded in a substantially U-shape and one lateral edge of each of said layers of the breaker structure being inserted between the two arms of the U of a corresponding strip of said pair.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |