US3799230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed radial tire
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1972-07-07
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Granted: 1974-03-26
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Expires: 1992-07-07
Abstract
Abstract The crown of a radial tire designed for high speeds has two lateral portions and a center portion, the lateral portions being narrower and more rigid than the center portion. The tire tread comprises, starting at the edges and proceeding towards the center: (a) two circumferential lateral ridges cut over their entire width by transverse grooves, (b) two circumferential lateral grooves substantially centered on the median lines of the comparatively rigid lateral portions of the crown, (c) two circumferential intermediate ridges substantially centered on the lines of junction of the comparatively rigid lateral portions and the less rigid center portion of the crown, (d) two circumferential center grooves, and (e) one circumferential center ridge at least as wide as the intermediate ridges.
Inventors
- 👤 J Montagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:42
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/0306; B60C11/04; B60C9/00; B60C9/18; B60C9/26; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/10783; Y10T152/10792
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A tire comprising a radial carcass and a crown, the crown comprising a tread and a reinforcement, the reinforcement extending substantially over the entire width of the tread, and the crown being formed with two lateral portions and a center portion, the lateral portions being narrower and more rigid than the center portion, and the tread comprising, starting at the edges and proceeding towards the center: (a) two circumferential lateral ridges cut over their entire width by transverse grooves, (b) two circumferential lateral grooves substantially centered on the median lines of the comparatively rigid lateral portions of the crown, (c) two circumferential intermediate ridges substantially centered on the lines of junction of the comparatively rigid lateral portions and the less rigid center portion of the crown, (d) two circumferential center grooves, and (e) one circumferential center ridge at least as wide as the intermediate ridges.
Claim 2
Dependent Claim
145 words
A tire comprising a radial carcass and a crown, the crown comprising a tread and a reinforcement, the reinforcement extending substantially over the entire width of the tread, and the crown being formed with two lateral portions and a center portion, the lateral portions being narrower and more rigid than the center portion, and the tread comprising, starting at the edges and proceeding towards the center: (a) two circumferential lateral ridges cut over their entire width by transverse grooves, (b) two circumferential lateral grooves substantially centered on the median lines of the comparatively rigid lateral portions of the crown, (c) two circumferential intermediate ridges substantially centered on the lines of junction of the comparatively rigid lateral portions and the less rigid center portion of the crown, (d) two circumferential center grooves, and (e) one circumferential center ridge at least as wide as the intermediate ridges.
Claim 3
Dependent Claim
28 words
A tire according to claim 1 comprising at least one fine circumferential cutout dividing the center ridge into at least two bands, the bands being of equal width.
Claim 4
Dependent Claim
19 words
A tire according to clam 1 wherein the center grooves are at least as wide as the lateral grooves.
Claim 5
Dependent Claim
19 words
A tire according to clam 1 wherein the center grooves are at least as wide as the lateral grooves.
Claim 6
Dependent Claim
33 words
A tire according to claim 3 wherein the ratio of the widths of the center and lateral grooves is substantially equal to the ratio of the widths of the center and intermediate ridges.
Claim 7
Dependent Claim
37 words
A tire according to claim 1 wherein the circumferential ridges and grooves have a zigzag pattern the successive segments of which form an angle within the range of 10* to 20* with respect to the circumferential direction.
Claim 8
Dependent Claim
15 words
A tire according to claim 1 wherein the center and intermediate ridges are circumferentially continuous.
References Cited (Backward Citations)
US3411559A
Cited
US3637001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |