US4088168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire having concave shoulders
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1976-06-07
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Granted: 1978-05-09
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Expires: 1996-06-07
Abstract
Abstract A tire of elastic material, which is at least partially without reinforcement, is formed of a tread with a shoulder on both sides thereof, each shoulder being extended by a sidewall which terminates in a bead. In accordance with the invention, the shoulders are formed by a zone whose circumferential deformations, for a deflection of the tire of between 0% and 30% of the height of the tire on the rim, are substantially equal to the radial deformations of said zone, the tire being mounted on a rim and inflated.
Inventors
- 👤 Jacques Boileau
- 👤 Albert Mathevet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:16
CPC Classifications
B; B60; B60C; B60C5/00; B60C5/01; B60C11/00; B60C11/01; B60C2011/013
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
A tire of elastic material, which tire is at least partially without reinforcement and comprises a tread extended on both sides by a shoulder followed by a sidewall terminating in a bead, characterized by the fact that the shoulders are without reinforcement and are each formed of a concave zone extending from the edge of the tread to the radially upper end of the sidewall, said concave zone having an average curvature which is between 0 and (1/0.2H), H being the height of the tire on a rim, said concave zone extending over a radial height h which is equal to between 5% and 40% of the height H of the tire on a rim, the circumferential deformations of said concave zone, for a deflection of the tire of between 0% and 30% of its height H on the rim, are substantially equal to the radial deformations of said concave zone, the tire being mounted on a rim and inflated.
Claim 2
Dependent Claim
160 words
A tire of elastic material, which tire is at least partially without reinforcement and comprises a tread extended on both sides by a shoulder followed by a sidewall terminating in a bead, characterized by the fact that the shoulders are without reinforcement and are each formed of a concave zone extending from the edge of the tread to the radially upper end of the sidewall, said concave zone having an average curvature which is between 0 and (1/0.2H), H being the height of the tire on a rim, said concave zone extending over a radial height h which is equal to between 5% and 40% of the height H of the tire on a rim, the circumferential deformations of said concave zone, for a deflection of the tire of between 0% and 30% of its height H on the rim, are substantially equal to the radial deformations of said concave zone, the tire being mounted on a rim and inflated.
Claim 3
Dependent Claim
19 words
The tire according to claim 1, characterized by the fact that the said concave zone is of constant thickness.
Claim 4
Dependent Claim
29 words
The tire according to claim 1, characterized by the fact that the beads have an axial width which is between 25% and 50% of the width of the rim.
Claim 5
Dependent Claim
17 words
The tire according to claim 1, characterized by the fact that the bead has a bead ring.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |