US3087526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire with separate tread rings
Assignee: Pirelli and C SpA
•
Filing: 1961-07-10
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Granted: 1963-04-30
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Barassi Carlo
- 👤 Cappa Giulio
- 👤 Cegnar Arrigo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:00
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A PNUEMATIC TIRE COMPRISING A CARCASS IN WHICH THE CORDS OF THE CARCASS PLIES ARE DISPOSED SUBSTANTIALLY RADIALLY OF THE TIRE, A PLURALITY OF LONGITUDINAL RIDGES ON THE OUTER PERIPHERY OF SAID CARCASS AND FORMING LONGITUDINAL GROOVES, AND A PLURALITY OF LONGITUDINALLY INEXTENSIBLE TREAD RINGS EACH HAVING AN ANNULAR REINFORCING STRUCTURE DISPOSED IN CLOSE PROXIMITY TO ITS RADIALLY INNERMOST PORTION, SAID RINGS BEING RECEIVED WITHIN SAID GROOVES AND PLACED UNDER TENSION BY THE INNER INFLATION PRESSURE OF THE TIRE, THE IMPROVEMENT WHICH COMPRISES ANNULAR BRIDGES INTEGRALLY CONNECTING ADJACENT TREAD RINGS AND BEING SUPERIMPOSED ON THE LONGITUDINAL RIDGES OF THE CARCASS AND BEING MADE OF THE SAME MATERIAL AS SAID RINGS.
Claim 2
Dependent Claim
111 words
IN A PNUEMATIC TIRE COMPRISING A CARCASS IN WHICH THE CORDS OF THE CARCASS PLIES ARE DISPOSED SUBSTANTIALLY RADIALLY OF THE TIRE, A PLURALITY OF LONGITUDINAL RIDGES ON THE OUTER PERIPHERY OF SAID CARCASS AND FORMING LONGITUDINAL GROOVES, AND A PLURALITY OF LONGITUDINALLY INEXTENSIBLE TREAD RINGS EACH HAVING AN ANNULAR REINFORCING STRUCTURE DISPOSED IN CLOSE PROXIMITY TO ITS RADIALLY INNERMOST PORTION, SAID RINGS BEING RECEIVED WITHIN SAID GROOVES AND PLACED UNDER TENSION BY THE INNER INFLATION PRESSURE OF THE TIRE, THE IMPROVEMENT WHICH COMPRISES ANNULAR BRIDGES INTEGRALLY CONNECTING ADJACENT TREAD RINGS AND BEING SUPERIMPOSED ON THE LONGITUDINAL RIDGES OF THE CARCASS AND BEING MADE OF THE SAME MATERIAL AS SAID RINGS.
References Cited (Backward Citations)
US2609026A
Cited
US2990867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |