Patent US3705613A successfully refreshed from Google Patents.
US3705613A
Expired / Lapsed
US
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Tire having tread grooves forming double network of continuous curves
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1971-02-23
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Granted: 1972-12-12
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Expires: 1991-02-23
Abstract
Abstract A tire has a tread formed with circumferential grooves following curves that are broken or undulating. The amplitudes of the curves increase in a direction from one edge towards the other edge of the tread. Over more than half the width of the tread, the curves followed by the grooves are substantially in phase opposition, and the grooves are connected to each other in such a manner that segments of one groove lie substantially in extensions of segments of an adjacent groove.
Inventors
- 👤 Henri Verdier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/0304; B60C11/0306; B60C11/11; B60C19/00; B60C19/001; B60C11/12; B60C11/1236; B60C2011/1254
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A pneumatic tire comprising a tread, said tread having a zone that extends over more than half the width thereof and that is formed with a plurality of circumferential grooves, each of said grooves describing repetitive curves, the amplitude of the curve described by each groove being substantially constant around the circumference of the tire, and the amplitudes of the curves described by successive grooves increasing progressively across the width of said zone, adjacent grooves describing curves in phase opposition and being connected to each other in such a manner that segments of one groove respectively lie substantially in extensions of segments of an adjacent groove.
Claim 2
Dependent Claim
106 words
A pneumatic tire comprising a tread, said tread having a zone that extends over more than half the width thereof and that is formed with a plurality of circumferential grooves, each of said grooves describing repetitive curves, the amplitude of the curve described by each groove being substantially constant around the circumference of the tire, and the amplitudes of the curves described by successive grooves increasing progressively across the width of said zone, adjacent grooves describing curves in phase opposition and being connected to each other in such a manner that segments of one groove respectively lie substantially in extensions of segments of an adjacent groove.
Claim 3
Dependent Claim
32 words
A pneumatic tire according to claim 1 wherein said tread is formed at one edge with transverse grooves connected to said circumferential grooves and debouching at said one edge of the tread.
Claim 4
Dependent Claim
25 words
A pneumatic tire according to claim 1 wherein said tread is formed with at least one circumferential rib in a portion thereof outside said zone.
Claim 5
Dependent Claim
44 words
A pneumatic tire according to claim 1 wherein said tread is formed at one edge with transverse grooves connected to said circumferential grooves and debouching at said one edge of the tread and is formed at the other edge with a continuous circumferential rib.
Claim 6
Dependent Claim
61 words
A pneumatic tire according to claim 1 wherein said tread is formed at one edge with transverse grooves connected to said circumferential grooves and debouching at said one edge of the tread and is formed at the other edge with a continuous circumferential rib, said continuous circumferential rib being formed with transverse grooves extending across a part of the width thereof.
Claim 7
Dependent Claim
21 words
A pneumatic tire according to claim 1 wherein the segments of said circumferential grooves form a double network of continuous curves.
Claim 8
Dependent Claim
73 words
A pneumatic tire according to claim 1 wherein said tread is formed in a portion thereof outside said zone with an additional circumferential groove describing a repetitive curve of smaller amplitude than that of the curve followed by the adjacent circumferential groove in said zone, said adjacent circumferential groove in said zone being formed with groove extensions extending towards but not connecting with said additional circumferential groove and substantially in phase opposition therewith.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |