US3789898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubeless tires
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1972-04-06
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Granted: 1974-02-05
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Expires: 1992-04-06
Abstract
Abstract A tire having excellent road-holding and wear properties is further improved behaviorally by providing a central articulation zone or joint in the tread thereof.
Inventors
- 👤 J Montagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:12
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/12; B60C11/04; B60C11/042; B60C11/1236; B60C11/125; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2006; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10801
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A tire for heavy-duty vehicles of the radial-carcass type with tread reinforced by a tread reinforcement, the relatively flat tread of which is cut over a fraction of its thickness by circumferential grooves, characterized by the fact that the tread has a central articulation or joint lying along a circumferential line at or adjacent the central plane of the tread more pronounced than along any other circumferential line distant from said plane and affecting substantially the entire thickness of the tread, said central articulation or joint being obtained by at least one incision of negligible width.
Claim 2
Dependent Claim
96 words
A tire for heavy-duty vehicles of the radial-carcass type with tread reinforced by a tread reinforcement, the relatively flat tread of which is cut over a fraction of its thickness by circumferential grooves, characterized by the fact that the tread has a central articulation or joint lying along a circumferential line at or adjacent the central plane of the tread more pronounced than along any other circumferential line distant from said plane and affecting substantially the entire thickness of the tread, said central articulation or joint being obtained by at least one incision of negligible width.
Claim 3
Dependent Claim
42 words
The tire according to claim 1 wherein the central articulation or joint of the tread is obtained by at least one incision of negligiBle width forming an extension of a central circumferential groove down to substantially the level of the tread reinforcement.
Claim 4
Dependent Claim
38 words
The tire according to claim 1 wherein the central articulation or joint of the tread is accentuated by the partitioning into two half plies of the protective ply or plies interposed between the tread and the tread reinforcement.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |