Patent US3315971A successfully refreshed from Google Patents.
US3315971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bell and spigot joint
Assignee: Amsted Industries Inc
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Filing: 1966-05-02
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Granted: 1967-04-25
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jim H Sakurada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:31
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/03; F16L17/032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A JOINT FOR A BELL AND SPIGOT COUPLING COMPRISING A BELL HAVING AN ANNULAR GROOVE DEFINED BY AN ANNULAR AXIALLY EXTENDING WALL AND AXIALLY SPACED OUTER AND INNER RADIALLY EXTENDING END WALLS, A SPIGOT EXTENDING INTO SAID BELL IN RADIALLY SPACED RELATIONSHIP THEREWITH, AND AN ANNULAR GASKET MADE ENTIRELY OF RESILIENT MATERIAL POSITIONED BETWEEN SAID BELL AND SPIGOT, SAID GASKET COMPRISING A MAIN PORTION HAVING A RADIALLY OUTER ANNULAR FACE ENGAGED WITH THE ANNULAR AXIALLY EXTENDING WALL OF THE GROOVE TERMINATING IN TWO AXIALLY SPACED RADIALLY EXTENDING END WALLS ENGAGED RESPECTIVELY WITH THE OUTER AND INNER RADIALLY EXTENDING END WALLS OF THE GROOVE AND BEING COMPRESSED AXIALLY BY THE GROOVE END WALLS, SAID MAIN PORTION HAVING ALSO A RADIALLY INNER FACE ENGAGED WITH THE SPIGOT AND BEING COMPRESSED THEREBY TO PROVIDE A LOW PRESSURE SEAL ADJACENT THE OUTER END WALL OF THE BELL, SAID RADIALLY INNER FACE OF THE MAIN PORTION OF THE GASKET BEING DEFINED BY FRUSTO-CONICAL WALL PORTIONS IN-
Claim 2
Dependent Claim
161 words
A JOINT FOR A BELL AND SPIGOT COUPLING COMPRISING A BELL HAVING AN ANNULAR GROOVE DEFINED BY AN ANNULAR AXIALLY EXTENDING WALL AND AXIALLY SPACED OUTER AND INNER RADIALLY EXTENDING END WALLS, A SPIGOT EXTENDING INTO SAID BELL IN RADIALLY SPACED RELATIONSHIP THEREWITH, AND AN ANNULAR GASKET MADE ENTIRELY OF RESILIENT MATERIAL POSITIONED BETWEEN SAID BELL AND SPIGOT, SAID GASKET COMPRISING A MAIN PORTION HAVING A RADIALLY OUTER ANNULAR FACE ENGAGED WITH THE ANNULAR AXIALLY EXTENDING WALL OF THE GROOVE TERMINATING IN TWO AXIALLY SPACED RADIALLY EXTENDING END WALLS ENGAGED RESPECTIVELY WITH THE OUTER AND INNER RADIALLY EXTENDING END WALLS OF THE GROOVE AND BEING COMPRESSED AXIALLY BY THE GROOVE END WALLS, SAID MAIN PORTION HAVING ALSO A RADIALLY INNER FACE ENGAGED WITH THE SPIGOT AND BEING COMPRESSED THEREBY TO PROVIDE A LOW PRESSURE SEAL ADJACENT THE OUTER END WALL OF THE BELL, SAID RADIALLY INNER FACE OF THE MAIN PORTION OF THE GASKET BEING DEFINED BY FRUSTO-CONICAL WALL PORTIONS IN-
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |