US3690364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial tire having breaker structure
Assignee: Industrie Pirelli SpA
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Filing: 1971-04-30
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Granted: 1972-09-12
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Expires: 1991-04-30
Abstract
Abstract The invention relates to improvements in the breaker structure for radial type pneumatic tires. The structure according to the invention comprises at least two superposed strips of textile material having at least one strip of metallic material interposed therebetween and an additional metallic or equivalent strip arranged radially outermost of the aforementioned strips. The improvement in the present invention resides in the fact that at least one of the textile strips is folded so as to provide a fold line along each edge of the structure.
Inventors
- 👤 Carlo Barassi
- 👤 Giuseppe Lugli
- 👤 Mario Mezzanotte
- 👤 Romano Guermandi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
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: 9
Claim 1
Independent Claim
208 words
A pneumatic tire for vehicle wheels, which comprises a radial carcass and a breaker structure formed by strips of cord fabric of textile material and by strips of cord fabric of metallic material or of another compression-resistant material, the cords of such strips being inclined with respect to the midcircumferential plane, said breaker structure comprising at least two superimposed strips of textile material whose cords are inclined at an angle ranging between 10* and 30* in one direction with respect to the mid-circumferential plane, at least one strip of metallic material or of another material having a high modulus of elasticity, inserted between said textile strips, whose cords are inclined in an opposite direction at an angle ranging between 13* and 33*, said angle being greater by at least 2* than the angle formed by the cords of said textile strips, an additional strip of metallic material or of another compression-resistant material arranged in a radially outer position, whose cords form with he mid-circumferential plane an angle ranging between 60* and 90*, characterized in that at least one of the strips of textiles material is folded in such a way that at least one folding line is present at each of the lateral edges of the breaker structure.
Claim 2
Dependent Claim
208 words
A pneumatic tire for vehicle wheels, which comprises a radial carcass and a breaker structure formed by strips of cord fabric of textile material and by strips of cord fabric of metallic material or of another compression-resistant material, the cords of such strips being inclined with respect to the midcircumferential plane, said breaker structure comprising at least two superimposed strips of textile material whose cords are inclined at an angle ranging between 10* and 30* in one direction with respect to the mid-circumferential plane, at least one strip of metallic material or of another material having a high modulus of elasticity, inserted between said textile strips, whose cords are inclined in an opposite direction at an angle ranging between 13* and 33*, said angle being greater by at least 2* than the angle formed by the cords of said textile strips, an additional strip of metallic material or of another compression-resistant material arranged in a radially outer position, whose cords form with he mid-circumferential plane an angle ranging between 60* and 90*, characterized in that at least one of the strips of textiles material is folded in such a way that at least one folding line is present at each of the lateral edges of the breaker structure.
Claim 3
Dependent Claim
37 words
A pneumatic tire as in claim 1, characterized in that one of the strips of textile material has a folding at each lateral edge of the breaker, whilst the other strip of textile material is not folded.
Claim 4
Dependent Claim
28 words
A pneumatic tire as in claim 2, characterized in that the folded textile strip is arranged in a radially outermost position with respect to the other textile strip.
Claim 5
Dependent Claim
26 words
A pneumatic tire as in claim 2, characterized in that one of the folded skirtings is directed radially inwardly whilst the other is directed radially outwardly.
Claim 6
Dependent Claim
32 words
A pneumatic tire as in claim 1, characterized in that one textile strip is folded at one edge of the breaker, whilst the other textile strip is folded at the opposite edge.
Claim 7
Dependent Claim
66 words
A pneumatic tire as in claim 1, characterized in that the folded textile strips have at least two skirtings of different width, the smaller skirting having a width ranging between 20 and 40 percent with respect to the breaker width, and the larger skirting having a width such that, whichever is the arrangement of the textile strips, its value is never higher than the breaker width.
Claim 8
Dependent Claim
36 words
A pneumatic tire as in claim 1, characterized in that the additional strip of metallic material, arranged in radially outer position, has a width ranging between 70 and 90 percent with respect to the breaker width.
Claim 9
Dependent Claim
35 words
A pneumatic tire as in claim 1 characterized in that the strip of metallic material interposed between the textile strips has a width ranging between 100 and 120 percent with respect to the breaker width.
References Cited (Backward Citations)
CA862522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |