Patent US3556168A successfully refreshed from Google Patents.
Patent US4186788A successfully refreshed from Google Patents.
US4186788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1978-03-02
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Granted: 1980-02-05
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Expires: 1998-03-02
Abstract
Abstract A pneumatic tire particularly useful in agriculture is improved due to the bars of its tread having an average angle of inclination, with respect to the longitudinal plane of symmetry, which is greater at their end adjacent the tread edges than at their other end and walls whose slope on the side of the leading edge of the bar is more abrupt towards the center of the tread than towards the edges of the tread and walls whose slope on the side of the trailing edge is more gentle towards the center of the tread than towards the edges of the tread.
Inventors
- 👤 Jean Pommier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:40
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/04; B60C11/042; B60C11/0311; B60C11/0316; B60C11/13; B60C11/1307; B60C11/1315
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
A pneumatic tire having a tread with two side edges, a longitudinal plane of symmetry and traction bars with a leading edge and a trailing edge, said traction bars having, with respect to said longitudinal plane of symmetry, an average angle of inclination which is greater at their end adjacent said side edges than at their end adjacent said longitudinal plane of symmetry, said leading edge having a slope more abrupt in the region of said longitudinal plane of symmetry than in the region of said side edges and said trailing edge having a slope more gentle in the region of said longitudinal plane of symmetry than in the region of said side edges.
Claim 2
Dependent Claim
114 words
A pneumatic tire having a tread with two side edges, a longitudinal plane of symmetry and traction bars with a leading edge and a trailing edge, said traction bars having, with respect to said longitudinal plane of symmetry, an average angle of inclination which is greater at their end adjacent said side edges than at their end adjacent said longitudinal plane of symmetry, said leading edge having a slope more abrupt in the region of said longitudinal plane of symmetry than in the region of said side edges and said trailing edge having a slope more gentle in the region of said longitudinal plane of symmetry than in the region of said side edges.
Claim 3
Dependent Claim
73 words
The pneumatic tire according to claim 1, in which the average angle of inclination of said traction bars with respect to said longitudinal plane of symmetry varies between two values of from 45° to 90°, the value at the end of said traction bars adjacent said longitudinal plane of symmetry being preferably about 46° and the value at the end of said traction bars adjacent said side edges being preferably about 66° C.
Claim 4
Dependent Claim
28 words
The pneumatic tire according to claim 1, in which the more abrupt slope forms an angle of between 0° and 8° with the radial direction of the tire.
Claim 5
Dependent Claim
28 words
The pneumatic tire according to claim 1, in which the more gentle slope forms an angle of between 6° and 20° with the radial direction of the tire.
Claim 6
Dependent Claim
25 words
The pneumatic tire according to claim 1, in which a longitudinal cross-section of said traction bars is wider at its foot than at its top.
Claim 7
Dependent Claim
30 words
The pneumatic tire according to claim 1, in which said two slopes vary steadily from the region of said side edges to the region of said longitudinal plane of symmetry.
Claim 8
Dependent Claim
30 words
The pneumatic tire according to claim 1, in which said two slopes vary stepwise from the region of said side edges to the region of said longitudinal plane of symmetry.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |