Patent US4231409A successfully refreshed from Google Patents.
US4231409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial vehicle tire
Assignee: Pirelli Tyre SpA
•
Filing: 1978-03-22
•
Granted: 1980-11-04
•
Expires: 1998-03-22
Abstract
Abstract This invention provides a pneumatic tire for vehicle wheels having a carcass, a tread and a breaker structure. The breaker structure has at least two layers of parallel cords at an angle of 10°-35° and made of a material having a tensile strength of at least 260 kg/mm 2 . The cords of one layer are crossed with respect to those of the adjacent layer. The breaker structure also has at least one strip of textile cords made of a material which shrinks in length when heated. The tire also has in each sidewall, a reinforcing element of at least one layer of textile or metal cords inclined with respect to the circumferential lines of the tire and at least two layers of cords parallel to each other in each layer and crossed with respect to those of the adjacent layer.
Inventors
- 👤 Mario Mezzanotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:27
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/08; B60C9/09; B60C9/0207; B60C9/18; B60C9/20; B60C9/2003; B60C9/2009
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
341 words
A pneumatic tire for vehicle wheels which comprises a carcass comprising at least one layer of cords laying in substantially radial planes, a tread, a breaker arranged between said carcass and said tread and comprising at least two layers of cords made of a material having a tensile strength of at least 260 kg/mm 2 , said cords being parallel to one another in each layer and crossed with respect to those of the adjacent layer and forming an angle ranging between 10° and 35° with respect to the equatorial plane, and at least one strip of textile cords made of a material which shrinks in length when heated, said textile cords being parallel to the equatorial plane and being arranged in a radially outermost position with respect to said layers, said tire comprising, in each sidewall, a reinforcing element comprising at least one layer of reinforcing cords inclined with respect to the circumferential lines of the tire, said reinforcing element extending radially at least from the zone axially adjacent the bead core to a point where its radially outer portion is disposed between said layers and said breaker strip, that portion of said reinforcing element which is disposed between said layers and said strip having a width ranging between 5% and 30% of the breaker width, said reinforcing element being arranged in an axially outermost position with respect to the carcass, said tire being characterized in that it further comprises, in each sidewall at least two layers of cords parallel to each other in each layer and crossed with respect to those of the adjacent layer, said cords forming an angle ranging from 30° to 65° with respect to the circumferential lines, said two layers being arranged between said carcass and said reinforcing element and extending radially from the zone axially adjacent the bead core as far as to extend with their radially outer portion between said carcass and said breaker layers, and in that said reinforcing element has its cords inclined at an angle ranging from 25° to 90°.
Claim 2
Dependent Claim
341 words
A pneumatic tire for vehicle wheels which comprises a carcass comprising at least one layer of cords laying in substantially radial planes, a tread, a breaker arranged between said carcass and said tread and comprising at least two layers of cords made of a material having a tensile strength of at least 260 kg/mm 2 , said cords being parallel to one another in each layer and crossed with respect to those of the adjacent layer and forming an angle ranging between 10° and 35° with respect to the equatorial plane, and at least one strip of textile cords made of a material which shrinks in length when heated, said textile cords being parallel to the equatorial plane and being arranged in a radially outermost position with respect to said layers, said tire comprising, in each sidewall, a reinforcing element comprising at least one layer of reinforcing cords inclined with respect to the circumferential lines of the tire, said reinforcing element extending radially at least from the zone axially adjacent the bead core to a point where its radially outer portion is disposed between said layers and said breaker strip, that portion of said reinforcing element which is disposed between said layers and said strip having a width ranging between 5% and 30% of the breaker width, said reinforcing element being arranged in an axially outermost position with respect to the carcass, said tire being characterized in that it further comprises, in each sidewall at least two layers of cords parallel to each other in each layer and crossed with respect to those of the adjacent layer, said cords forming an angle ranging from 30° to 65° with respect to the circumferential lines, said two layers being arranged between said carcass and said reinforcing element and extending radially from the zone axially adjacent the bead core as far as to extend with their radially outer portion between said carcass and said breaker layers, and in that said reinforcing element has its cords inclined at an angle ranging from 25° to 90°.
Claim 3
Dependent Claim
26 words
A pneumatic tire as in claim 1, characterized in that said two layers of cords arranged in each sidewall comprise a single ply folded on itself.
Claim 4
Dependent Claim
32 words
A pneumatic tire as in claim 2, characterized in that the folding edge of said ply forming said two layers is arranged between the cord layers of the breaker and the carcass.
Claim 5
Dependent Claim
45 words
A pneumatic tire as in claim 1, characterized in that said two layers of cords arranged in each sidewall extend between the carcass and the two breaker layers for a portion having a width ranging between 5% and 25% of the width of said breaker.
Claim 6
Dependent Claim
43 words
A pneumatic tire as in claim 1, characterized in that the radially inner ends of said two layers of cords arranged in each sidewall are disposed in the zone adjacent the cores, in an axially outer position with respect to the carcass turn-ups.
Claim 7
Dependent Claim
58 words
A pneumatic tire as in claim 1, characterized in that it comprises in each sidewall at least one strip of textile cords parallel to the circumferential lines, arranged in an axially outermost position with respect to said reinforcing element, said strip extending from the shoulder zone as far as at least one half of the tire section height.
Claim 8
Dependent Claim
23 words
A pneumatic tire as in claim 6, characterized in that said strip is made of a material which shrinks in length when heated.
Claim 9
Dependent Claim
24 words
A pneumatic tire as in claim 6, characterized in that said strip is the prolongation of the strip of textile cords of the breaker.
Claim 10
Dependent Claim
18 words
The pneumatic tire of claim 1 wherein said reinforcing element comprises at least one layer of textile cords.
Claim 11
Dependent Claim
19 words
The pneumatic tire of claim 1 wherein the said reinforcing element comprises at least one layer of metal cords.
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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |