US4184529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire having a tread reinforcement
Assignee: Compagnie Generale des Etablissements Michelin SCA
•
Filing: 1977-08-01
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Granted: 1980-01-22
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Expires: 1997-08-01
Abstract
Abstract A tread reinforcement of an off the road tire for heavy carrier vehicles comprises at least three plies, two of which each have a strength substantially less than the third, one of these two plies having its edges folded at least around the edges of the third.
Inventors
- 👤 Jacques Boileau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/26; B60C9/20; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10792
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
In a tire for heavy carrier vehicles traveling off the road, having a radial carcass reinforcement and a tread reinforcement formed of oblique steel cable plies, the improvement wherein said oblique steel cable plies have about the same axial width and consist of a normal nonfolded edge ply, a fractional nonfolded edge ply and a fractional folded edge ply, the two edges of the fractional folded edge ply being folded around at least the edges of the normal nonfolded edge ply, the oblique steel cables of the fractional nonfolded edge ply and the oblique steel cables of the fractional folded edge ply being substantially parallel to one another but crossed with the oblique steel cables of the normal nonfolded edge ply, and the sum of the strengths of the two fractional plies being equal to the strength of a comparison normal folded edge ply having oblique steel cables oreinted in the same direction as that of the oblique steel cables of the two fractional plies.
Claim 2
Dependent Claim
165 words
In a tire for heavy carrier vehicles traveling off the road, having a radial carcass reinforcement and a tread reinforcement formed of oblique steel cable plies, the improvement wherein said oblique steel cable plies have about the same axial width and consist of a normal nonfolded edge ply, a fractional nonfolded edge ply and a fractional folded edge ply, the two edges of the fractional folded edge ply being folded around at least the edges of the normal nonfolded edge ply, the oblique steel cables of the fractional nonfolded edge ply and the oblique steel cables of the fractional folded edge ply being substantially parallel to one another but crossed with the oblique steel cables of the normal nonfolded edge ply, and the sum of the strengths of the two fractional plies being equal to the strength of a comparison normal folded edge ply having oblique steel cables oreinted in the same direction as that of the oblique steel cables of the two fractional plies.
Claim 3
Dependent Claim
29 words
The improved tire defined by claim 1 wherein the two edges of the fractional folded edge ply are also folded around the edges of the fractional nonfolded edge ply.
Claim 4
Dependent Claim
96 words
The improved tire defined by claim 1 wherein the oblique steel cables of the fractional folded edge ply are arranged along an angle which, in absolute value, is between 15° and 40°, the oblique steel cables of the fractional nonfolded edge ply are arranged along an angle which, in absolute value, is between 15° and 40°, and the oblique steel cables of the normal nonfolded edge ply are arranged along an angle which, in absolute value, is between 15° and 30°, all of said angles being measured with respect to the circumferential direction of the tire.
Claim 5
Dependent Claim
23 words
The improved tire defined by claim 1 wherein the fractional folded edge ply has a median zone along which said ply is interrupted.
Claim 6
Dependent Claim
21 words
The improved tire defined by claim 1 wherein the two edges of the fractional folded edge ply are folded radially inwards.
Claim 7
Dependent Claim
21 words
The improved tire defined by claim 1 wherein the two edges of the fractional folded edge ply are folded radially outwards.
Claim 8
Dependent Claim
78 words
The improved tire defined by claim 1 wherein the oblique steel cables of the fractional folded edge ply and the oblique steel cables of the fractional nonfolded edge ply are both arranged along an angle which, in absolute value, is 26°, whereas the oblique steel cables of the normal nonfolded edge ply are arranged along an angle which, in absolute value, is 20°, all of said angles being measured with respect to the circumferential direction of the tire.
Claim 9
Dependent Claim
56 words
The improved tire defined by claim 1 wherein the angle between the oblique steel cables of the fractional folded edge ply and the circumferential direction of the tire and the angle between the oblique steel cables of the fractional nonfolded edge ply and the circumferential direction of the tire do not differ by more than 5°.
References Cited (Backward Citations)
FR1299622A
Cited
FR1473029A
Cited
US3831656A
Cited
US3949797A
Cited
DE2428386A1
Cited
US4067372A
Cited
US3945422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |