US3703202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tread ring for removable tread tires
Assignee: Industrie Pirelli SpA
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Filing: 1971-03-03
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Granted: 1972-11-21
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Expires: 1991-03-03
Abstract
Abstract A tread ring for removable tread tires which is provided with a tension-resistant armor formed by a helically wound metal cord having coils disposed substantially parallel to the midcircumferential plane of the tire. This structure is provided with layers disposed radially inwardly and outwardly of the armor. The layers embody metal cords disposed parallel to one another in each layer and extend along two directions crossed relative to the mid-circumferential plane of the tire. The ratio between tensile strength of the layers and the armor is greater than 0.3 and less than 1.
Inventors
- 👤 Luigi Maiocchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/02; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2006; B60C9/22; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10801
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A tread ring for removable tread tires, having a tensionresistant armor formed by a helically wound metal cord, the coils of which are disposed in a direction substantially parallel to the mid-circumferential plane of the tire, and comprising two additional layers of metal cords parallel to one another in each layer and disposed along two directions crossed with respect to the mid-circumferential plane, characterized in that the ratio between the tensile strength of each of the two additional layers and the tensile strength of the armor is greater than 0.3 and less than 1.
Claim 2
Dependent Claim
94 words
A tread ring for removable tread tires, having a tensionresistant armor formed by a helically wound metal cord, the coils of which are disposed in a direction substantially parallel to the mid-circumferential plane of the tire, and comprising two additional layers of metal cords parallel to one another in each layer and disposed along two directions crossed with respect to the mid-circumferential plane, characterized in that the ratio between the tensile strength of each of the two additional layers and the tensile strength of the armor is greater than 0.3 and less than 1.
Claim 3
Dependent Claim
94 words
A tread ring for removable tread tires, having a tension-resistant armor formed by a helically wound metal cord, the coils of which are disposed in a direction substantially parallel to the mid-circumferential plane of the tire, and comprising two additional layers of metal cords parallel to one another in each layer and disposed along two directions crossed with respect to the mid-circumferential plane, characterized in that the ratio between the tensile strength of each of the two additional layers and the tensile strength of the armor is greater than 0.3 and less than 1.
Claim 4
Dependent Claim
94 words
A tread ring for removable tread tires, having a tension-resistant armor formed by a helically wound metal cord, the coils of which are disposed in a direction substantially parallel to the mid-circumferential plane of the tire, and comprising two additional layers of metal cords parallel to one another in each layer and disposed along two directions crossed with respect to the mid-circumferential plane, characterized in that the ratio between the tensile strength of each of the two additional layers and the tensile strength of the armor is greater than 0.3 and less than 1.
References Cited (Backward Citations)
US3557858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |