Patent US3656533A successfully refreshed from Google Patents.
US3656533A
Expired / Lapsed
US
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Multi-material breakers in radial tires
Assignee: Industrie Pirelli SpA
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Filing: 1970-09-17
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Granted: 1972-04-18
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Expires: 1990-09-17
Abstract
Abstract A breaker structure for radial tires includes two or more strips of textile material in which the cords are inclined at a selected angle in one direction relative to the mid-circumferential plane, at least one strip compression-resistant material between the textile strips and in which the cords are inclined in an opposite direction to the textile cords, and an additional strip of compression-resistant material disposed radially outwardly of the aforesaid strips.
Inventors
- 👤 Carlo Barassi
- 👤 Giuseppe Lugli
- 👤 Mario Mezzanotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:39
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2006; B60C9/2009; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10792
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
A pneumatic tire for vehicle wheels which comprises a tread, a radial carcass and a breaker structure constituted by strips of cord fabric of textile material and by strips of cord fabric of compression-resistant material, the cords of said strips being inclined with respect to the mid-circumferential plane, and which is characterized in that said breaker structure comprises at least two superimposed strips of textile material, the cords of which are inclined relative to the mid-circumferential plane, at an angle ranging between 10* and 30* in one direction, at least one strip of a compression-resistant material having a high modulus of elasticity, and inserted between said textile strips, the cords of which are inclined at an angle ranging between 13* and 33* in an opposite direction, said angle being greater by at least 2* than the angle formed by the cords of said textile strip with respect to said plane, and an additional strip of compression-resistant material, disposed in a radially outer position, the cords of which form an angle ranging between 60* and 90* with respect to said plane.
Claim 2
Dependent Claim
180 words
A pneumatic tire for vehicle wheels which comprises a tread, a radial carcass and a breaker structure constituted by strips of cord fabric of textile material and by strips of cord fabric of compression-resistant material, the cords of said strips being inclined with respect to the mid-circumferential plane, and which is characterized in that said breaker structure comprises at least two superimposed strips of textile material, the cords of which are inclined relative to the mid-circumferential plane, at an angle ranging between 10* and 30* in one direction, at least one strip of a compression-resistant material having a high modulus of elasticity, and inserted between said textile strips, the cords of which are inclined at an angle ranging between 13* and 33* in an opposite direction, said angle being greater by at least 2* than the angle formed by the cords of said textile strip with respect to said plane, and an additional strip of compression-resistant material, disposed in a radially outer position, the cords of which form an angle ranging between 60* and 90* with respect to said plane.
Claim 3
Dependent Claim
34 words
A pneumatic tire as in claim 1, characterized in that the cords of the radially outermost additional strip are inclined at an angle ranging between 75* and 85* with respect to the mid-circumferential plane.
Claim 4
Dependent Claim
28 words
A pneumatic tire as in claim 1, characterized in that said additional strip has a width greater by 5-20 percent than the largest one of the other strips.
Claim 5
Dependent Claim
23 words
A pneumatic tire as in claim 1, characterized in that said additional strip has a width substantially equal to that of said tread.
References Cited (Backward Citations)
US3242965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |